Physics College

Which statements describe chemical changes? Check all that apply.
The after-rain smell is produced by an interaction between rain and the oils released by plants.
A homemade volcano can be created by combining baking soda and vinegar. When it erupts, carbon dioxide gas is released.
Sheep are sheared for their wool. The wool is cleaned and twisted into yarn. The yarn is dyed and used to knit clothing.
The Statue of Liberty has turned green over time due to the reaction of copper with carbon dioxide and water.
Mosaic art is created by smashing colored glass tiles and rearranging them to form a picture or design.

Answers

Answer 1

The answers are a,b and d

Answer 2

Answer: A, B, and D

Related Questions

A wooden block has a mass of 562 g and a volume of 72 cm3. What is the density?

15 points !!!!!!!!!!!

Answers

Answer:

Density of the wooden block is [tex]7805.5\ kg/m^3[/tex]          

Explanation:

It is given that,

Mass of the wooden block, m = 562 g = 0.562 kg

Volume of the block, [tex]V=72\ cm^3=7.2\times 10^{-5}\ m^3[/tex]

We need to find the density of the block. Mass per unit volume of an object is called its density. It is given by :

[tex]d=\dfrac{m}{V}[/tex]

[tex]d=\dfrac{0.562\ kg}{7.2\times 10^{-5}\ m^3}[/tex]

[tex]d=7805.5\ kg/m^3[/tex]

So, the density of the wooden block is [tex]7805.5\ kg/m^3[/tex]. Hence, this is the required solution.

Density of a Material

The density of a material is defined as the mass per unit volume

it formula is given as

Density = Mass/Volume

and the unit is g/cm^3

Explanation:

Given data

Mass = 562 g

Volume = 72 cm3

Hence the density is expressed as

Density =  562 /72

Density = 7.80 g/cm^3

therefore the density is 7.80 g/cm^3

for more information on density see the link below

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Air is contained in a cylinder device fitted with a piston-cylinder. the piston initially rests on a set of stops, and a pressure of 200 kpa is required to move the piston. initially, the air is at 100 kpa and 238c and occupies a volume of 0.25 m3. determine the amount of heat transferred to the air, in kj, while increasing the temperature to 700 k. assume air has constant specific heats evaluated at 300 k.

Answers

A boiling pot of water (the water travels in a current throughout the pot), a hot air balloon (hot air rises, making the balloon rise) , and cup of a steaming, hot liquid (hot air rises, creating steam) are all situations where convection occurs. 
Read more on Brainly.com - https://brainly.com/question/1581851#readmore

describe the difference between mechanical and electromagnetic waves. Give an example of each kind of wave related to telecommunications.

Answers

The main difference between mechanical and electromagnetic waves is that mechanical waves require a medium in order to propagate, while electromagnetic waves can propagate also in vacuum.

Examples of telecommunication via mechanical waves are sound waves (so, two people speaking to each other, for instance), while examples of telecommunication via electromagnetic waves are the radio waves that transmit the TV signals to the houses.

An amusement park ride raises people high into the air, suspends them for a moment, and then drops them at a rate of free-fall acceleration. Is a person in this ride experiencing apparent weightlessness, true weightlessness, or neither? Explain.

Answers

An object experiences true weightlessness when the net force of all gravitational forces acting upon the object is zero. In this case, the gravitational force exerted by the earth on the people that are on the park ride while it's free falling never ceases to act on the people. If the person on the ride were in a case of true weightlessness then they would not fall in any direction in the first place. The answer is the apparent weightlessness.

Answer: apparent weighlessness.


Explanation:


1) Balance of forces on a person falling:


i) To answer this question we will deal with the assumption of non-drag force (abscence of air).


ii) When a person is dropped, and there is not air resistance, the only force acting on the person's body is the Earth's gravitational attraction (downward), which is the responsible for the gravitational acceleration (around 9.8 m/s²).


iii) Under that sceneraio, there is not normal force acting on the person (the normal force is the force that the floor or a chair exerts on a body to balance the gravitational force when the body is on it).


2) This is, the person does not feel a pressure upward, which is he/she does not feel the weight: freefalling is a situation of apparent weigthlessness.


3) True weightlessness is when the object is in a place where there exists not grativational acceleration: for example a point between two planes where the grativational forces are equal in magnitude but opposing in direction and so they cancel each other.


Therefore, you conclude that, assuming no air resistance, a person in this ride experiencing apparent weightlessness.

Based on what you have read, explain the advantages of digital signals over analog signals.

Answers

Digital signals do not pass noise along, so the sound heard is likely very close to the signal that was sent. Digital signals also can be stored more easily than analog signals. Recorded analog signals degrade over time, while recorded digital signals do not.

Sample Response: Digital signals do not pass noise along, so the sound heard is likely very close to the signal that was sent. Digital signals also can be stored more easily than analog signals. Recorded analog signals degrade over time, while recorded digital signals do not.

After the sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf state. in this state, it would have approximately the same mass as it has now, but its radius would be equal to the radius of the earth. (a) calculate the average density of the white dwarf.

Answers

To calculate the density of the white dwarf we need the mass of the Sun and the radius of the Earth:
- Sun mass: [tex]M=1.99 \cdot 10^{30}kg[/tex]
- Earth radius: [tex]r=6.37 \cdot 10^6 m[/tex]
Assuuming the dwarf to be a perfect sphere, its volume is [tex]V= \frac{4}{3} \pi r^3[/tex].
The average density is given by
[tex]d= \frac{M}{V} [/tex]
so, substituting we find
[tex]d= \frac{M}{ \frac{4}{3}\pi r^3 }=1.83 \cdot 10^9 kg/m^3 [/tex]

A 150 g baseball is traveling horizontally at 50 m/s. If the ball takes 20 ms to stop once it is in contact with the catcher’s glove, what average force did the ball exert on the catcher?

Answers

To solve for force, you need to get the product of mass and acceleration. 
F = ma

Your given is:
m = 150g
a = ?
v = 50 m/s
t = 20ms

As you can see, you do not have acceleration yet. But if you read the problem you can come up with the formula of acceleration. 
Acceleration is the change in velocity over a period of time.

a = change in velocity/time

To get the change in velocity, you get the difference between the initial velocity and final velocity:

[tex]a = \frac{vf-vi}{t} [/tex]

The ball was moving initially at a velocity of 50 m/s and it came to a stop. This is your clue. If a ball comes to a stop then that means that the final velocity of the ball is 0 m/s. 

So we can put it into our formula now:

[tex]a = \frac{0m/s-50m/s}{20ms} [/tex]

WAIT! As you can see, the units do not match. We have ms and s into our equation and that means you cannot proceed till they are the same. First we need to convert ms to s. 

[tex]20ms[/tex] x [tex] \frac{1s}{1000ms} [/tex] = [tex] \frac{20s}{1000} = 0.02s [/tex]

So your new time is 0.02s. Now we put this time into the formula:


[tex]a = \frac{0m/s-50m/s}{0.02s} [/tex]
[tex]a = \frac{-50m/s}{0.02s} = -2,500 m/ s^{2} [/tex]

As you can see our acceleration is a negative value, this indicates that it decelerated or slowed down which makes sense because it was brought to a stop. 

So now we have our acceleration. Now using this, we can get our force. 

[tex]F= ma[/tex]

Before we start doing this, you need to take note that the unit of force is N, but when you expand it, it is [tex]kg.m/ s^{2} [/tex] but as you can see our mass given is in grams. So again, before you put them into the equation we need to change it into kg first. 

[tex]150g = \frac{1kg}{1,000g} = \frac{150kg}{1,000} = 0.150kg[/tex]

Our new mass is 0.150kg. 

To make things clearer, let us write down all our new values:

m = 0.150kg
a = -2,500 [tex]m/ s^{2} [/tex]

Now that all our units match, we can put that into our formula:

[tex]F= ma[/tex]
[tex]F= (0.150kg)(-2,500m/s^{2})[/tex]
[tex]F = -375kg.m/ s^{2} or -375N[/tex]

The value again is negative because it is going against the initial direction of the ball. But if your instructor just wants to get the value of force or the magnitude of the force, just disregard the sign. 



Which of the following puts the MOST demand on water supplies? Question 18 options: A) flood B) overpopulation C) drought D) pollution

Answers

option (b) is correct.

Overpopulation puts the most demand on water supplies.The reservoirs of the water are fixed but the human population is ever increasing. The needs of water for drinking, washing,industrial use like medicines, construction etc are thus increasing with every passing day.So, we are continuously running out of the water supplies. Because of the overpopulation. the pollution of water is also increasing, thus rendering the water unfit for drinking.

Thus overpopulation puts the most demand on water supplies.

Answer:

option (b) overpopulation is the  correct option for this question

Explanation:

Overpopulation is the reason  in increasing demand on water supplies.Overpopulation is a bothersome condition where the quantity of existing human populace surpasses the conveying limit of Earth. Overpopulation is brought about by number of variables. Decreased death rate, better restorative offices, consumption of valuable assets are few of the causes which results in overpopulation. Because of the overpopulation. the pollution of water is also increasing, thus rendering the water unfit for drinking


What is the kinetic energy of a 3000 lb car traveling at 60 mph?

Answers

5 × 12 = 60 I got 60mph I multiply and that's how I get 60

An eagle that has a mass of 4.5 kg is spotted 5 m above a lake. It flies up to its nest in a tree at a height of 25m

Answers

I FOUND YOUR COMPLETE QUESTION IN OTHER SOURCES.
 PLEASE SEE ATTACHED IMAGE.  
 Let's  define potential energy:
 By definition, the potential energy is given by:
 Ep = m * g * h
 Where,
 m: mass
 g: gravity
 h: height.
 The potential energy change is:
 Delta Ep = Epf- Epi
 Delta Ep = m * g * hf  -  m * g * hi
 Delta Ep = m * g * (hf - hi) 
 The, we have
 Substituting values:
 Delta Ep = (4.5) * (9.8) * (25 - 5)
 Delta Ep = 882 J
 Answer:
 the eagle gain: 
 Delta Ep = 882 J

Answer:

c

Explanation:

just took test on edge but not sure if i was right :) goodluck gs

A 2.00 kg block is placed against a spring on a frictionless 36° incline. the spring, whose spring constant is 19.8n/cm, is compressed 22.8 cm and then released. what is the elastic potential energy of the compressed spring?

Answers

Final answer:

The elastic potential energy of the compressed spring with a spring constant of 19.8 N/cm and compressed 22.8 cm is approximately 51.5 Joules.

Explanation:

The elastic potential energy (EPE) stored in a spring is calculated using the formula EPE = 1/2 k x², where k is the spring constant, and x is the displacement from the spring's equilibrium position. Given that the spring constant is 19.8 N/cm and the spring is compressed 22.8 cm, we must first convert the spring constant to N/m by multiplying by 100, giving us 1980 N/m. Using the formula, the elastic potential energy is thus EPE = 1/2 (1980 N/m) (0.228 m)² = 1/2 (1980) (0.051984) J = 51.504 J. Therefore, the potential energy of the compressed spring is approximately 51.5 Joules.

A bird lands on a bare copper wire carrying a current of 51
a. the wire is 8 gauge, which means that its cross-sectional area is 0.13 cm2. (a) find the difference in potential between the bird's feet, assuming they are separated by a distance of 5.1 cm.

Answers

The resistance of the piece of wire is
[tex]R= \frac{\rho L}{A} [/tex]
where
[tex]\rho = 1.68 \cdot 10^{-8}\Omega m[/tex] is the resistivity of the copper
[tex]L=5.1 cm=0.051 m[/tex] is the length of the piece of wire
[tex]A=0.13 cm^2 = 0.13 \cdot 10^{-4} m^2[/tex] is the cross sectional area of the wire
By substituting these values, we find the value of R:
[tex]R= \frac{\rho L}{A}=6.6 \cdot 10^{-5} \Omega [/tex]

Then, by using Ohm's law, we find the potential difference between the two points of the wire:
[tex]V=IR=(51 A)(6.6 \cdot 10^{-5} \Omega )=3.4 \cdot 10^{-3} V[/tex]

An object in motion will stay in motion unless acted upon by what type of force

Answers

An object will stay in motion unless acted upon by an UNBALANCED force. 
The answer Is unbalanced On USATESTPREP

Julius competes in the hammer throw event. The hammer has a mass of 7.26 kg and is 1.215 m long. What is the centripetal force on the hammer when it has a tangential speed of 31.95 m/s? The answer is rounded off to the nearest whole number. 190 N 840 N 1,400 N 6,100 N

Answers

In the circular motion of the hammer, the centripetal force is given by
[tex]F=m \frac{v^2}{r} [/tex]
where m is the mass of the hammer, v its tangential speed and r is the distance from the center of the motion, i.e. the length of the hammer.
Using the data of the problem, we find:
[tex]F=m \frac{v^2}{r}=(7.26 kg) \frac{(31.95 m/s)^2}{1.215 m}=6100 N [/tex]

Answer:

6,100 N

Explanation:

The uniform bar of mass m and length l is balanced in the vertical position when the horizontal force p is applied to the roller at
a. determine the bar's initial angular acceleration and the acceleration of its top point
b.

Answers

Which of the following is NOT a factor in efficiency?A.metabolismB.type of movementC.muscle efficiencyD.digestion

Eddie and Val observed the picture of an athlete running in a race. Eddie stated the picture shows potential energy being transformed to kinetic energy. Val stated that it shows chemical energy being transformed to mechanical energy. Which best explains who is correct?

Only Eddie is correct because the picture does not show a transformation that starts with chemical energy.

Only Eddie is correct because the picture does not show a transformation that ends with mechanical energy.

Both Eddie and Val are correct because chemical energy is a type of potential energy and mechanical energy includes kinetic energy.

Both Eddie and Val are correct because chemical energy is a type of kinetic energy and mechanical energy includes potential energy.


ITS NOT THE LAST ONE I GOT THAT ONE WRONG LAST TIME

Answers

Answer:

"Both Eddie and Val are correct because chemical energy is a type of potential energy and mechanical energy includes kinetic energy."

Explanation:

Answer:

C

Explanation:

now give me brainly please

As the army approached the bridge into the city, the commander told them to break step. He did not want the soldiers to march in cadence. Why did the commander give this order?

Answers

At a definite point, the bridge would begin oscillating to the matching rhythm as that of the marching footsteps. This oscillation would touch a determined peak when the bridge can no longer tolerate its own power and later collapses. So, soldiers are systematic to break their steps while passing a bridge.

Soldiers are ordered to 'route step' across a bridge to prevent forced oscillations and resonance that can lead to structural failure if marching is synchronized.

The reason soldiers are usually ordered to "route step" or walk out of step across a bridge has to do with forced oscillations and resonance. When soldiers march in cadence, their synchronized steps act as a periodic force that can cause the bridge to oscillate at its natural frequency if the cadence matches this frequency. This can amplify the oscillations to dangerous levels, potentially leading to structural failure of the bridge. By breaking step, the soldiers apply random forces to the bridge, which decreases the chances of resonance occurring, thus maintaining the structural integrity of the bridge.

what are 3 adjectives that describe a super bowl crowd

Answers

Loud
Crazed
Herd-like
Irrational
Deafening
Primitive
Possessed
Tribal

What condition occurs when the eyeball is too long?

Answers

Hello!

Myopia, also known as nearsightedness, occurs when the eyeball is too long. This condition is very common in the U.S and throughout the world. It can be corrected by wearing glasses or contact lenses.

Explanation :

There can be many eye defects in the human eye. Some of them are Myopia, Hypermetropia, Astigmatism etc.

In Myopia the size of the eyeball is too long and the image is formed in front of the retina. A person suffering from this defect is not able to see far objects clearly but can see nearby objects normal.

Concave lenses are used to correct this defect so that the image is focused on the retina.

A skier moving at 4.75 m/s encounters a long, rough, horizontal patch of snow having a coefficient of kinetic friction of 0.220 with her skis. how far does she travel on this patch before stopping?

Answers

First we need to find the acceleration of the skier on the rough patch of snow.
We are only concerned with the horizontal direction, since the skier is moving in this direction, so we can neglect forces that do not act in this direction. So we have only one horizontal force acting on the skier: the frictional force, [tex]\mu m g[/tex]. For Newton's second law, the resultant of the forces acting on the skier must be equal to ma (mass per acceleration), so we can write:
[tex]ma=-\mu m g[/tex]
Where the negative sign is due to the fact the friction is directed against the motion of the skier.
Simplifying and solving, we find the value of the acceleration:
[tex]a=-(0.220)(9.81 m/s^2)=-2.16 m/s^2[/tex]

Now we can use the following relationship to find the distance covered by the skier before stopping, S:
[tex]2aS=v_f^2-v_i^2[/tex]
where [tex]v_f=0 [/tex] is the final speed of the skier and [tex]v_i=4.75 m/s[/tex] is the initial speed. Substituting numbers, we find:
[tex]S=- \frac{v_i^2}{2a}=- \frac{(4.75 m/s)^2}{2(-2.16 m/s^2)}=5.23 m [/tex]

When Trinity pulls on the rope with her weight, Newton's Third Law of Motion tells us that the rope will _____

Answers

When Trinity pulls on the rope with her weight, Newton's Third Law of Motion tells us that the rope will "pull back".


Newton's third law of motion expresses that, at whatever point a first question applies a power on a second object, the first object encounters a power meet in extent however inverse in heading to the power that it applies.  

Newton's third law of movement reveals to us that powers dependably happen in sets, and one question can't apply a power on another without encountering a similar quality power consequently. We once in a while allude to these power matches as "action-reaction" sets, where the power applied is the activity, and the power experienced in kind is the response (despite the fact that which will be which relies upon your perspective).

What is the Milgram experiment?

Answers

Answer:

The study was unethical

Explanation:

The study was deceptive to the participants, It failed to protect the participants involved and it denied them the right to withdraw from the experiment.

You are given a cylinder of outer radius 3.27 cm and length of 11.5 cm. along the axis of the cylinder is a hole of diameter 2.47 cm. find the volume of this cylindrical shell.

Answers

  Required Volume (V) = Area of the base * Height

Area of the base = Pi [ 3.27² - (2.47/2)² ] since 2.47 is diameter and not radius. = Pi ( 9.981675 )

Therefore Volume (V) = Pi ( 9.981675) * 15.9 = 498.5978739 cm³ = 498.6 cm³.

The charge within a small volume dv is dq=ρdv. the integral of ρdv over a cylinder of length l is the total charge q=λl within the cylinder. use this fact to to determine the constant ρ0 in terms of λ and r. hint: let dv be a cylindrical shell of length l, radius r, and thickness dr. what is the volume of such a shell?

Answers

The volume of the shell that you described would be:
[tex]dV=2L\pi r dr[/tex]
Now we can rewrite the given integral:
[tex]\lambda L=\int\rho dV=L\rho\int2\pi r dr \\ \lambda L =L\rho \pi r^2\\ \rho=\frac{\lambda}{\pi r^2}[/tex]
I have attached the picture explaining how we got the formula for the volume.
On the picture, I marked the rectangle. You can of this rectangle as the base, and the height would be the circumference of the cylinder.

Answer:

Given

dq=density*dv

q=lamda*I

Taking double integration

density=lamda/2*pi*r^2

Which statement best describes the characteristics of white light? A. White light is composed of a spectrum of many different colors. B. White light is composed of radiation with a wide range of amplitudes. C. White light is composed of various wavelengths of light not seen by the naked eye. D. White light is composed of radiation that travels at different speeds producing various colors

Answers

a white light is, by definition, apparently colorless light, for example ordinary daylight. It contains all the wavelengths of the visible spectrum at equal intensity.

so A.

White light is composed of a spectrum of many different colors (Option A).

What is the spectrum?

The spectrum is the variety of colors created when light travels through a glass prism or a drop of water.

White light is a mixture of all the colors of the visible spectrum, which includes red, orange, yellow, green, blue, indigo, and violet. When light passes through a prism, it is separated into its individual colors, creating a rainbow-like effect.

This is because different colors of light have different wavelengths, and a prism bends the light of different wavelengths by different amounts, causing them to spread out and form a spectrum.

So, white light is actually composed of many different colors of light, each with its own unique wavelength.

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Forces are _______ which means they need to be determined by not only their numeric value (amount of force in Newton's) but also their _______.


please help this is a science question

Answers

Forces are vectors, which means they need to be determined by not only their numeric value (amount of force in Newton's) but also their direction.

Some other examples of vector quantities include displacement, acceleration,  velocity, and momentum.  Each of these isn't complete until you know its size and direction.

There are other quantities that have size but no direction.  They include distance, speed, volume, temperature, cost, and loudness.  These are called "scalars".

The n = 2 to n = 6 transition in the bohr hydrogen atom corresponds to the ________ of a photon with a wavelength of ________ nm.

Answers

The energy levels of the hydrogen atom are quantized and their energy is given by the approximated formula
[tex]E=- \frac{13.6}{n^2} [eV] [/tex]
where n is the number of the level.

In the transition from n=2 to n=6, the variation of energy is
[tex]\Delta E=E(n=6)-E(n=2)=-13.6 ( \frac{1}{6^2}- \frac{1}{2^2} )[eV]=3.02 eV[/tex]
Since this variation is positive, it means that the system has gained energy, so it must have absorbed a photon.

The energy of photon absorbed is equal to this [tex]\Delta E[/tex]. Converting it into Joule,
[tex]\Delta E=3.02 eV=4.84 \cdot 10^{-19}J[/tex]
The energy of the photon is
[tex]E=hf[/tex]
where h is the Planck constant while f is its frequency. Writing [tex]\Delta E=hf[/tex], we can write the frequency f of the photon:
[tex]f= \frac{\Delta E}{h}= \frac{4.84 \cdot 10^{-19}J}{6.63 \cdot 10^{-34}m^2 kg/s}=7.29 \cdot 10^{14}Hz [/tex]

The photon travels at the speed of light, [tex]c=3 \cdot 10^8 m/s[/tex], so its wavelength is
[tex]\lambda = \frac{c}{f}= \frac{3 \cdot 10^8 m/s}{7.29 \cdot 10^{14}Hz}=4.11 \cdot 10^{-7}m=411 nm [/tex]

So, the initial sentence can be completed as:
The n = 2 to n = 6 transition in the bohr hydrogen atom corresponds to the "absorption" of a photon with a wavelength of "411" nm.
Final answer:

The transition of an electron from n = 2 to n = 6 in a hydrogen atom in the Bohr model involves the absorption of a photon. The wavelength of this photon can be calculated using the Rydberg formula, but a specific value cannot be provided without additional information.

Explanation:

The student's question relates to the Bohr model of the hydrogen atom and specifically to the transition of an electron from the n = 2 energy level to the n = 6 energy level. According to Bohr's model, when an electron in a hydrogen atom transitions between two energy levels, it either absorbs or emits a photon whose energy equals the difference in energy between the two levels.

To find the wavelength of the photon associated with the transition, you can use the Rydberg formula:


   Calculate the energy involved in the transition using the formula
   E = hc/λ where E is the energy of the photon, h is Planck's constant, c is the speed of light, and λ is the wavelength.
   Rearrange to find the wavelength: λ = hc/E.

The exact calculations require substituting the values of h, c, and E (with E determined by the specific energy levels involved in the transition - here from n = 2 to n = 6).

Because this question does not provide all the numerical values needed for the calculation, such as Planck's constant and the speed of light, and does not specify whether the transition represents absorption or emission, we cannot provide a specific value for the wavelength. However, it's important to note that transitions to higher energy levels (n > 2) correspond typically to absorption, and the wavelength would fall into a specific region of the electromagnetic spectrum depending on its energy.

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A particle moving in the x direction is being acted upon by a net force f(x)=cx2, for some constant
c. the particle moves from xinitial=l to xfinal=3l. what is δk, the change in kinetic energy of the particle during that time? express your answer in terms of c and l.

Answers

The work-energy theorem states that the change in kinetic energy of the particle is equal to the work done on the particle:
[tex]\Delta K = W[/tex]
The work done on the particle is the integral of the force on dx:
[tex]W= \int\limits^{3L}_L {F(x)} \, dx = \int\limits^{3L}_L {cx^2} \, dx = \frac{26}{3}cL^3 [/tex]
So, this corresponds to the change in kinetic energy of the particle.

The change in kinetic energy during that time is : [tex]\frac{26}{3} cl^{3}[/tex]

Given data :

Direction of particle = x

Net force = F(x) = cx²

Initial position = l

Final position = 3l

Determine the change in kinetic energy during this time

we will apply the work energy theorem which is : ΔK = W

To determine change in kinetic energy we have to determine the work done on the particle.

Work done on particle ( W ) =  [tex]\int\limits^3_l F({x}) \, dx[/tex] =  [tex]\int\limits^3_l c{x^{2} } \, dx =[/tex] [tex]\frac{26}{3} cl^{3}[/tex]

Hence the change in kinetic energy during that time is : [tex]\frac{26}{3} cl^{3}[/tex]

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the lowest pitched sounds humans can generally hear have a frequency of roughly 20 Hz. What is the approximate wavelength of these sound waves if their wave speed is 340 m/A?

Answers

V = Frequency x Wavelength.

V = 340;
340 = 20 x Wavelength; divide both sides by 20.
Wavelength = 17

The wavelength is 17m.

I hope this helps!

"V = Frequency x Wavelength.

V = 340;

340 = 20 x Wavelength; divide both sides by 20.

Wavelength = 17"

Explanation:

A strong lightning bolt transfers about 25 c to earth. how many electrons are transferred? the elementary charge is 1.60218 × 10−19
c.

Answers

The total charge transferred is [tex]Q=25 C[/tex]. This total charge consists of N electrons, each one with charge [tex]e=1.6 \cdot 10^{-19}C[/tex]. To find N, the number of electrons transferred, we must simply divide the total charge by the charge of a single electron:
[tex]N= \frac{Q}{e}= \frac{25 C}{1.6 \cdot 10^{-19}C}=1.56 \cdot 10^{20} [/tex]
Final answer:

To determine how many electrons are transferred in a lightning strike, you divide the total charge transferred (in this case, 25 coulombs) by the elementary charge which is the charge per electron. The result approximates to 1.56 × 1020 electrons.

Explanation:

The number of electrons transferred during a lightning strike can be determined by dividing the total charge transferred by the charge of a single electron. The charge of a single electron, also known as the elementary charge, is approximately 1.60218 × 10-19 Coulombs. Therefore, if a lightning bolt transfers about 25 Coulombs to the ground, the number of electrons transferred can be calculated as follows:

Number of electrons = Total charge transferred / Charge per electron

= 25 Coulombs / 1.60218 × 10-19 Coulombs

Therefore, a lightning bolt that transfers about 25 Coulombs to the earth transfers approximately 1.56 × 1020 electrons.

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The probability that a bakery has demand for 2 3 4 or 5 birthday cakes on any given day are 0.32, 0.24, 0.25 and 0.19 respectively. construct a probability distribution for this data Which term BEST applies to president richard nixons foreign policy of improving relations with the soviet union? (SELECT ALL THAT APPLY) WILL REPORTSelect the items that were part of the Missouri Compromise. A.Texas was admitted as a slave state.B Missouri was admitted as a slave state. Maine was admitted as a free state. C.The slave trade was abolished in the north.D. The tariff compromise of 1833 was passed.E. No slavery was allowed north of 36 30'. VERY EASY! HELP ME RIGHT NOW! DUE TOMORROW To make money, one must work.Para ganar dinero, ___________ trabajar.fill in blank What is the sum of 2 numbers is 100 and their difference is 6? what mechanical layer lies below the lithosphere Can someone check my answers?1. Simplify the sum or difference. sqrt 5 + 6 sqrt 5A) 6 sqrt 5B) 30C) 6 sqrt 10D) 7 sqrt 52. Simplify the sum or difference.4 sqrt 2 - 7 sqrt 2A) negative sqrt 6B) -3 sqrt 2C) -11 sqrt 2D) 11 sqrt 23. Simplify the sum or difference.3 sqrt 7 - sqrt 63A) -2 sqrt 7B) -6 sqrt 7C) -4 sqrt 3D) 04. Simplify the sum or difference.-6 sqrt 10 + 5 sqrt 90A) 9 sqrt 10B) -9 sqrt 10C) -39 sqrt 10D) -105. Simplify the product.sqrt 6 (sqrt 2 + sqrt 3)A) sqrt 8 + 3B) sqrt 30C) 2 sqrt 3 + 3 sqrt 2D) 4 sqrt 2 + 3 7 cakes cost 5.60 , what would be the cost of:10 cakes5 cakes12 cakes A ________ is a small, lightweight, power-conserving, computing device that is capable of wireless access. The process of producing recombinant dna involves taking a gene from one organism and attaching it to the dna from another organism. write and an analogy that describes this process. Selena is buying an audio system for her car. She can choose among 3 types of stereos, 4 kinds of speakers, and 2 kinds of amplifiers. Which describes how Selena can show her options? What is the percentage of the total students chose skateboarding?A.) 10%B.) 20% C.) 30%D.) none of these The firing of a Revolutionary War cannon is used to open the local Fourth of July festivities. The muzzle of the cannon barrel is 6 feet above ground level. The height of the cannon ball being fired from the Revolutionary War cannon as a function of elapsed time is modeled by the function h(t) = 16t2 + 75t + 6, where h(t) is the height of the cannon ball in feet, and t is the elapsed time since firing in seconds. Determine at approximately what elapsed time(s) the cannon ball will be at a height of 55 feet. Two cities are 124 miles apart from each other. The cities are 4cm on a map, what is the Scale factor? Plastics are artificial substances. However, the materials needed to produce plastics are often crude oil. Which is a reasonable conclusion based on this fact?A. Plastics require oil and therefore will be lighter than any other material B. Plastics require oil and therefore must be more costly to use than other materialC. Plastics require oil and therefore are renewable resourcesD. Plastics require oil and therefore are nonrenewable resource Read this excerpt from Canto XIX of the Inferno: And [Pope Nicholas III] cried, "Are you already standing there, Are you already standing there, Boniface? By several years the record lied to me! "Are you so quickly glutted with the wealth Which did not make you fear to take by guile The lovely lady and then lay her waste?" I acted like a person who's left standing -- Not comprehending what's been said to him -- Half-mocked and at a loss to make an answer. Then Virgil spoke up, "Tell him right away, 'I am not he, I'm not the one you think!'" And I replied as I had been instructed.What is most likely Dante's purpose for including this scene?A. To show the audience that he believed Boniface deserved to be in Hell as well.B. To show the audiences that even popes are human and capable of mistakes.C. To emphasize Dante's need to impress Virgil with his knowledge of sinners.D. To emphasize that Pope Nicholas III should not be in Hell. What is the distance between the points (9, 32) and (9, 17) in the coordinate plane? what is meaning of microbes,remeber the word micro means small Miguel is playing a game in which a box contains four chips with numbers written on them. Two of the chips have the number 1, one chip has the number 3, and the other chip has the number 5. Miguel must choose two chips, and if both chips have the same number, he wins $2. If the two chips he chooses have different numbers, he loses $1 ($1). Let X = the amount of money Miguel will receive or owe. Fill out the missing values in the table. (Hint: The total possible outcomes are six because there are four chips and you are choosing two of them.) Xi 2 1 P(xi) What is Miguels expected value from playing the game? answer= $2 Based on the expected value in the previous step, how much money should Miguel expect to win or lose each time he plays? answer= $2 What value should be assigned to choosing two chips with the number 1 to make the game fair? Explain your answer using a complete sentence and/or an equation. A game at the fair involves a wheel with seven sectors. Two of the sectors are red, two of the sectors are purple, two of the sectors are yellow, and one sector is blue. Landing on the blue sector will give 3 points, landing on a yellow sector will give 1 point, landing on a purple sector will give 0 points, and landing on a red sector will give 1 point. Let X = the points you have after one spin. Fill out the missing values in the table. Xi P(xi) If you take one spin, what is your expected value? What changes could you make to values assigned to outcomes to make the game fair? Prove that the game would be fair using expected values. The point guard of a basketball team has to make a decision about whether or not to shoot a three-point attempt or pass the ball to another player who will shoot a two-point shot. The point guard makes three-point shots 30 percent of the time, while his teammate makes the two-point shot 48 percent of the time. Xi 3 0 P(xi) 0.30 0.70 Xi 2 0 P(xi) 0.48 0.52 What is the expected value for each choice? Should he pass the ball or take the shot himself? Explain. Claire is considering investing in a new business. In the first year, there is a probability of 0.2 that the new business will lose $10,000, a probability of 0.4 that the new business will break even ($0 loss or gain), a probability of 0.3 that the new business will make $5,000 in profits, and a probability of 0.1 that the new business will make $8,000 in profits. Claire should invest in the company if she makes a profit. Should she invest? Explain using expected values. If Claires initial investment is $1,200 and the expected value for the new business stays constant, how many years will it take for her to earn back her initial investment?