Answers
The question involves a block sliding down a 30-degree incline, where the forces of gravity, normal force, and friction are in effect. The acceleration of the block can be determined by taking into account all the forces acting on it. This is a topic in Physics, typically studied at the high school level.
Explanation:In the described scenario, a block is sliding down a rough ramp inclined at 30 degrees. This topic falls under the area of Physics, specifically in the study of friction and forces. The forces at play in this situation are gravity, normal force, and frictional force. When a block slides down an inclined plane, the force of gravity is divided into two components. The component parallel to the ramp, mg sin θ, acts downwards and is opposed by the force of friction.
The frictional force is determined by multiplying the normal force by the coefficient of friction (μ). This could be represented as F = μN, where F is the frictional slide and N is the normal force. The block's acceleration depends on the net force acting on it, considering all the forces at play.
In this particular situation, where there's a known coefficient of friction of 0.20 and given gravitational and normal forces are 40 N, you can use these values, along with the angle of the ramp, to find the acceleration of the block using formulae from physics.
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A block sliding down a rough incline experiences forces from gravity, friction, and normal force. Friction opposes the motion, reducing the acceleration the block would have on a frictionless slope. The acceleration can be calculated from the incline angle and friction coefficient.
Explanation:The question deals with the physics of a block sliding down a rough, incline plane. When a block is sliding down an inclined plane, there are several forces at play. The gravitational force pulls the block downwards, the normal force counters this directly perpendicular to the slope, and friction acts to oppose the motion of the block. The coefficient of friction between the block and the incline plays a crucial role in the block's acceleration down the incline.
The acceleration of the block can be calculated using the formula a = g sin θ, where g is acceleration due to gravity and θ is the incline angle. However, this applies when there's negligible friction. If friction is involved, it reduces the acceleration from this value. The acceleration on an incline where there is friction can be calculated with the equation ax = g sin θ - μk g cos θ, where μk is the coefficient of kinetic friction.
Using the equation above, you can calculate acceleration if you are given the friction coefficient and the incline's angle. However, if you're given the acceleration and either the incline angle or friction coefficient, you can rearrange the equation to calculate the missing variable, helping you gain more understanding about the impacts of the slope and friction.
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Related Questions
Which of the following are properties of acids?
Check all that apply.
A. React with certain metals to produce hydrogen gas
B. React with other acids to produce salt and water
C. Taste sour
D. Corrosive
Answers
Explanation:
Acids taste sour, and most acids are poisonous. Furthermore, acids react with certain metals to produce hydrogen gas. Few acids are corrosive as well. The option (B) is not valid because acids react with BASES (not with other acids) to produce salt and water. Hence A, C and D are the correct options.
The true statements as regarding the properties of acids are:
React with certain metals to produce hydrogen gas (option A)Taste sour (option C)Corrosive (option D)What are the properties of acids?An acid is a substance which dissolves in water to produced hydronium ion as the only positive ion.
Acid is know for it unique properties which differentiate them from other substances. Such properties includes:
Acids reacts with metals to produce hydrogen gas.Acids have sour taste.Acids are corrosive in natureAcids react with base to form salt and waterAcids have a pH lower than 7Acid turn blue litmus paper redWith the above information about acids, we can conclude that the correct statement as given from the options are:
React with certain metals to produce hydrogen gas (option A)Taste sour (option C)Corrosive (option D)Learn more about properties of acid:
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Tara's cell phone plan costs $39.00 a month, which includes 100 text messages. After she uses all of her text messages, it will cost her $.15 per text message
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Form of communication that reaches large audiences without personal contact.
Answers
The form of communication that doesn't require personal contact and capable of getting to a large audience is referred to as mass media.
What is Communication?This is the process in which information is transferred from one person to another.
Mass media which comprises of newspapers, internet etc reach large audiences without personal contact and is the commonest means in these present day.
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Two men each have a mass of 90 kg. If the gravitational force between them is 8.64 10-8 N, how far apart are they? G = 6.67 × 10-11 N⋅(m/kg)2
Answers
F = Gm1m2/d^2, where F = gravitational force, m1 & m2 = mass of the two bodies, G = Gravitational constant, d = distance between the bodies.
Substituting;
8.64*10^-8 = (6.67*10^-11*90*90)/d^2
d^2 = (6.67*10^-11*90^2)/(8.64*10^-8)
d = Sqrt [(6.67*10^-11*90^2)/(8.64*10^-8)] = 2.5 m
The two men are 2.5 m apart.
Answer:
2.5
Explanation:
-a p e x
A wave is traveling through a particular medium. The wave source is then modified so that it now emits waves at a higher frequency. Does the wavelength
A.)increase
B.) decrease
C.) stay the same
D.) depend on other factors
Answers
The frequency and wavelength of a wave, traveling through a medium, are inversely related. Therefore if the frequency of the wave increases, the wavelength decreases.
Explanation:When a wave travels through a medium, it does so with a specific speed determined by the medium's properties itself. The frequency and wavelength of a wave are inversely related according to the wave equation speed = frequency x wavelength. Therefore, if the frequency of a wave increases (as per the question), the wavelength would decrease in order to maintain the same wave speed.
To think of it more intuitively, you can consider that a wave hitting a point more frequently (higher frequency) would mean that the waves are 'packed' closer together, which means a smaller wavelength.
So, the correct answer to your question is B.) decrease.
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The speed of sound in dry air is approximately 340 m/s to 342 m/s at 0°c. true or false
Answers
This answer is false!
The electron has the positron as its antiparticle
a. True
b. False
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Hope it helps, let me know if this is the answer, so other people know too, and if its not they will ignore this :-)
True
electron has negative charge on it. the antiparticle has the same amount of charge on it but of opposite polarity. hence the antiparticle must have positive charge on it. positron has positive charge on it having same magnitude as that on the electron. hence the above statement is true.
CAN ANYONE HELP ME WITH A FEW PROJECTS THEY ARE DUE TONIGHT AND I'M STRUGGLING, PLZ HELP
Answers
Element Z has a half-life of 20 minutes. In an events chain concept map tracing the nuclear decay of a 200g sample of element Z, would any of element Z remain after 160 minutes? If so, how much?
Answers
N(t) = N(o) e^(-0.693t/t1/2)
N(t) = Amount remaining after time t, N(o) = Initial amount at t=0, t1/2 = Half-life.
This expression is of exponential type and thus there is an amount remaining at any given time.
At t = 120 minutes, the amount remaining can be calculated as follows:
Substituting for the values given;
N(160) = 200*e^(-0.693*120/20) = 3.13 g
Given a half-life of 20 minutes for element Z, a 200g sample would undergo eight cycles of reduction by half over 160 minutes, leaving 0.78g of element Z remaining. The element doesn't disappear but transforms into 'daughter elements'.
Explanation:The concept being discussed here is known as the half-life, which is the time it takes for half the atoms in a sample to decay. In this case, element Z has a half-life of 20 minutes. Given that the half-life is the time it takes for half of a substance to decay, we would use this information to determine the remaining quantity of element Z after 160 minutes.
A 200g sample of Element Z would undergo eight half-life cycles in 160 minutes (20 minutes per cycle). Following the pattern of half-life decay, after each cycle the remaining amount would be 100g, 50g, 25g, 12.5g, 6.25g, 3.125g, 1.56g, and finally 0.78g. So, after 160 minutes, there would be 0.78g of element Z remaining.
Please note that the substance doesn't completely disappear but transforms into decay products or, using the metaphor, 'daughter elements' while element Z is the 'parent' element.
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A circuit consisting of a 140 µF capacitor in series with a 2 MΩ resistor is connected across a 6 V battery. What is the time constant of the circuit? Answer in units of s.
Answers
[tex]\tau = RC[/tex]
where R is the resistance and C the capacitance.
For the circuit in our problem,
[tex]R=2M\Omega = 2 \cdot 10^6 \Omega[/tex]
and
[tex]C=140 \mu F = 140 \cdot 10^{-6}F[/tex]
Therefore, the time constant of this circuit is
[tex]\tau =RC=(2 \cdot 10^{6} \Omega)(140 \cdot 10^{-6} F)=280 s[/tex]
Which type of mirror is used to focus light rays?
Answers
and please do not report me be cause people do that and say my answers are not good
Which statement about the speed of light is true?
A. The speed of light is faster for EM waves traveling through a medium.
B. No object or EM wave can move faster than the speed of light in a vacuum.
C. The speed of light changes depending on the motion of the source.
D. Energy, frequency, and wavelength all affect the speed of light.
Answers
Final answer:
Option B is correct; the speed of light is a universal constant in a vacuum and is unaltered by the source's motion or the observer. The speed decreases in different media while the frequency remains constant, leading to a change in wavelength.
Explanation:
The correct statement about the speed of light is that no object or electromagnetic (EM) wave can move faster than the speed of light in a vacuum. This is expressed as option B: No object or EM wave can move faster than the speed of light in a vacuum.
It is a fundamental postulate of the theory of relativity that the speed of light in a vacuum is a constant, which is approximately 3.00×108 m/s, and does not depend on the motion of the source or the observer. In fact, the speed of light will slow down when it passes through a medium due to interactions with the material's atoms, which change its permittivity and/or permeability.
The wavelength and speed of light can change as light enters different media; however, the frequency remains constant. This phenomenon can be explained using the relation n = c/v, where 'n' is the index of refraction, 'c' is the speed of light in a vacuum, and 'v' is the speed of light in the medium. Since the frequency (f) is unaltered, and we know that v = λf (where λ is the wavelength), the wavelength must adjust to accommodate the change in speed when light travels through various media.
Which of the following is an example of social facilitation?
A. The football player who practices hard so he can be on the varsity team
B. The Olympic bicycle racer who goes faster when he is racing against a person rather than the clock
C. The bowler who bowls best when he is practicing on his own
D. The tennis player who is frustrated when the crowd yells at her
Answers
Option B i.e The Olympic bicycle racer who goes faster when is racing against a person rather than a clock.
As the social facilitation refers to the improvement of performance produced by the presence of others, The Olympic bicycle racer who goes faster when is racing against a person rather than a clock is the best example of social facilitation.
The tennis player who is frustrated when the crowd yells at her is not an example of social facilitation. Though there are presence of people, but their yell at her frustrated her which would worsen her performance.
Answer:
The correct answer is option B, The Olympic bicycle racer who goes faster when he is racing against a person rather than the clock
Explanation:
In social facilitation, a person works/performs better than his/her normal work/performance as he/she is in presence of other people. There are basically two type of social facilitation –
a) co-action effects – when a person works with other person as a co-worker
b) audience effect – when a person works in the mere presence of another person.
In this case , an Olympic racer competes with another racer, thus this would be a co –action effect.
Two beams of coherent light are shining on the same sheet of white paper. when referring to the crests and troughs of such waves, where will darkness appear on the paper?
Answers
The middle of the paper will serve as the node and there will be darkness seen at this node.
What is a wave?A wave is a disturbance along a medium which transfers energy. In this case, the two waves will constitute a standing wave.
The middle of the paper will serve as the node and there will be darkness seen at this node.
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What is the frequency of a microwave that has a wavelength of 5 cm?what is the frequency of a microwave that has a wavelength of 5 cm?
Answers
The average velocity of a microwave is 3x10^8m/s.
3x10^8m/s= (.05m) x frequency
f= 6x10^9Hz
Frequency of a microwave is 6 × 10⁹ Hz
Given that;
Wavelength of microwave = 5 cm = 0.05 m
Find:
Frequency of a microwave
Computation:
Velocity of microwave = 3 × 10⁸ m/s
Velocity = Frequency × Wavelength
3 × 10⁸ = Frequency of a microwave × 0.05
Frequency of a microwave = 6 × 10⁹ Hz
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Maggie participated in a race. She ran 100 meters west and then turned back and ran to the starting line to complete the race. Maggie covered this entire distance in 40 seconds. What are her average speed and average velocity?
Answers
However, her displacement was 0, since she ended at the same place she began, therefore, her average velocity is 0 / 40 s = 0.
Answer:
Explanation:
:)
What is the magnitude of δv12 if the bulb is removed from the socket (i.e. the circuit is not closed)?
Answers
I = 0 A
ΔV₁₂ = IR
= (OA)(2Ω)
= 0 V
Since the circuit is incomplete or not closed, no current flows in the circuit. as per ohm's law , Voltage is directly proportional to current and is given as
V = Voltage = i R where i = current , R = resistance
as no current flows in the circuit, i = 0
the resistance R can not be zero. hence
V = 0 (R)
V = 0 Volts
so the magnitude of the Voltage is zero Volts
If continental crust were thinner than its average thickness of 40 km, would it depress the mantle more or less than it does now? Explain.
Answers
It is less dense than the material of the Earth's mantle and thus "floats" on top of it.
Continental crust is also less dense than oceanic crust, though it is considerably thicker; mostly 35 to 40 km versus the average oceanic thickness of around 7-10 km.
About 40% of the Earth's surface is now underlain by continental crust.
If the continental crust were thinner, it would depress the mantle less because of the reduced mass above the mantle, leading to less displacement below.
If the continental crust were thinner than its average thickness of 40 km, it would depress the mantle less than it does now. This is because the Earth's crust and mantle are in a state of isostatic equilibrium, which is similar to floating objects on a fluid, where less material above results in less displacement below. The continental crust is thicker and less dense compared to the oceanic crust, which allows it to float higher above the mantle. When the crust is loaded with additional weight, such as through mountain building or glaciation, it depresses further into the mantle due to the added mass. Conversely, if the continental crust were thinner, there would be less mass pushing down on the mantle, leading to a reduced depression of the crust into the mantle.
When you put a ice cube in a warm drink and the ice cube thermal energy decreases and the drink thermal energy increases, how does the energy move? What is the situation when the ice cube would give off the heat?
Answers
In this case, the thermal energy flows from the hot beverage that is at the temperature t1 to the ice cube at the temperature t2 until the two reach the same temperature t3.
Where:
t1> t2 <t3.
The ice cube would emit heat if the temperature of the liquid with which it comes in contact with the smaller than that of the ice.
If it takes a cheetah 0.25 seconds to go from 10m/s to 15 m/s what is the cheetahs acceleration
Answers
=5/0.25 =20m/s^2
The acceleration of the cheetah going from 10 m/s to 15 m/s in 0.25 seconds is 20 m/s², calculated using the acceleration formula a = Δv / Δt.
You want to know the acceleration of a cheetah that goes from 10 m/s to 15 m/s in 0.25 seconds. To calculate the acceleration, you can use the formula:
a = Δv / Δt
Where a represents acceleration, Δv is the change in velocity, and Δt is the change in time. In this case:
Δv = 15 m/s - 10 m/s = 5 m/s
Δt = 0.25 s
Now, plug these values into the formula:
a = 5 m/s / 0.25 s
a = 20 m/s²
So, the cheetah's acceleration is 20 m/s². This is a straightforward example of calculating linear acceleration.
What is the source of the radioactive nuclei present in spent fuel rods?
Answers
One object has a charge of +5.0 · 10-6 c, and a second object has a charge of +2.0 · 10-6
c. the objects are 0.5 meters apart. what is the electrostatic force between them?
Answers
[tex]F=k \frac{q_1 q_2}{r^2} [/tex]
where
k is the Coulomb's constant
q1 is the charge of the first object
q2 is the charge of the second object
r is the separation between the two objects
In our problem:
[tex]q_1=+5.0 \cdot 10^{-6} C[/tex]
[tex]q_2 = +2.0 \cdot 10^{-6} C[/tex]
[tex]r=0.5 m[/tex]
So if we plug these numbers into the equation, we can find the electrostatic force between the two objects:
[tex]F=(8.99 \cdot 10^9 Nm^2C^{-2}) \frac{(5.0 \cdot 10^{-6} C)(2.0 \cdot 10^{-6}C)}{(0.5 m)^2}=0.36 N [/tex]
Final answer:
Using Coulomb's Law, the electrostatic force between two positive charges of +5.0 · 10^-6 C and +2.0 · 10^-6 C, 0.5 meters apart, is calculated to be approximately 0.0719 Newtons, indicating a repulsive force.
Explanation:
To calculate the electrostatic force between two charges, we use Coulomb's Law, which is expressed as F = k * |q1 * q2| / r2, where F is the force between the charges, k is the Coulomb's constant (approximately 8.987 x 109 N m2/C2), q1 and q2 are the magnitudes of the charges, and r is the distance between the centers of the two charges.
For the charges of +5.0 · 10-6 C and +2.0 · 10-6 C separated by 0.5 meters, we substitute these values into the formula to get the electrostatic force. Therefore, F = (8.987 x 109) * (5.0 x 10-6 * 2.0 x 10-6)/(0.5)2.
After calculating, F equals approximately 0.0719 Newtons. This force is repulsive since both charges are positive.
What is a charestic of an electromagnetic wave?
Answers
Suppose the exhaust system on a heat engine is not functioning properly. Which statement best explains how this will affect the engine?
A) The temperature of the gas will not increase during the compression stage.
B) Burned gases will not be released into the surrounding air.
C) The fuel-air mixture will not be able to enter the cylinder.
D) Combustion and subsequent gas expansion will not occur.
Answers
If the exhaust system on a heat engine is not functioning properly then burned gases will not be released into the surrounding air. Therefore, option (B) is correct.
What is the exhaust system?An exhaust system can be used to guide reaction exhaust gases away from the controlled combustion in an engine. The entire system delivers burnt gases from the engine and involves one or more exhaust pipes.
An exhaust pipe should be carefully designed to carry toxic gases away from the users of the machine. Generators and furnaces can immediately fill an enclosed space with poisonous exhaust gases such as carbon monoxide, hydrocarbons, and nitrogen oxides.
The gases from most kinds of machines are very hot and the pipe must be heat-resistant. It should not pass near anything that can burn or can be damaged by heat. A chimney also serves as an exhaust pipe in a stationary system.
If the exhaust system is not functioning properly then burned gases will not be emitted into the surrounding air.
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Answer:B)
Explanation:
In which of the following forms of energy might you find specially placed tiles on the floor?
Answers
Answer:
Passive solar
Explanation:
Total mechanical energy is equal to _____.
PE + KE
PE × KE
PE ÷ KE
PE - KE
Answers
potential energy plus genetic energy
The answer is the first choice
Answer:
The total mechanical energy is equal to P.E+K.E.
(a) is correct.
Explanation:
Potential energy :
Potential energy is the store energy and It is represents by U.
It is defined as:
[tex]P.E= U =mgh[/tex]
Where, m = mass of the object
g = acceleration due to gravity
h =height
Kinetic energy :
Kinetic energy is defined as the energy of motion. It represents by K.
It is defined as:
[tex]K.E = \dfrac{1}{2}mv^2[/tex]
Where, m = mass of the object
v = velocity of the object
According to law of conservation,
The total mechanical energy is the sum of the potential energy and kinetic energy is constant in time.
[tex]T = P.E+K.E[/tex]
Hence, The total mechanical energy is equal to P.E+K.E.
How does the doppler effect explain differences in sound pitch? choose all that apply?
Answers
Doppler effect explains that the approaching sound wave has a shorter apparent wavelength than the sound wave moving away thus the approaching sound wave has a higher pitch than the sound wave moving away.
What is doppler effect?As a wave is approaching towards an observer is amplitude and frequency increases for the observer. Whereas , when it goes away from the observer, thus when it assume longer wavelength the frequency decreases and the intensity of the wave that the observer collects reduces.
The frequency of a sound wave is called pitch. As the wavelength of the wave increases, its pitch decreases. The apparent wavelength of the sound waves near to the observer will be lower.
When the wave moves away its apparent wavelength increases result in the decreased pitch of the sound waves for the observer.
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Light goes from flint glass into ethanol. the angle of refraction in the ethanol is 25.6 ◦ , the index of refraction for flint glass is 1.61, and the index of refraction for ethanol is 1.36. what is the angle of incidence in the glass? answer in units of ◦ .
Answers
[tex]n_i \sin \theta_i = n_r \sin \theta_r[/tex]
where
[tex]n_i[/tex] is the refractive index of the first medium
[tex]n_r[/tex] is the refractive index of the second medium
[tex]\theta_i[/tex] is the angle of incidence
[tex]\theta_r[/tex] is the angle of refraction
In our problem,
[tex]n_i =1.61[/tex]
[tex]n_r=1.36[/tex]
[tex]\theta_r =25.6^{\circ}[/tex]
So if we re-arrange Snell's law and we use these data, we can find the angle of incidence:
[tex]\sin \theta_i = \frac{n_r}{n_i} \sin \theta_r = \frac{1.36}{1.61} \sin (25.6^{\circ}) = 0.365 [/tex]
which gives
[tex]\theta_i = \arcsin(0.365)=21.4^{\circ}[/tex]
The angle of incidence can be solved by using Snell's law of refraction as follows: θ1 = arcsin[(n2*sin(θ2)) / n1], which when calculating, provides the angle of incidence.
Explanation:The problem presented in the question can be solved using Snell's Law of refraction. Snell's law is defined as n1*sin(θ1) = n2*sin(θ2), where n1 and n2 are the indices of refraction, and θ1 and θ2 are the angles of incidence and refraction, respectively.
From the given data in the problem we know that n1 = 1.61 (flint glass), n2 = 1.36 (ethanol), and θ2 = 25.6°. What we want to find is θ1 (angle of incidence in glass).
First, rearrange Snell's law to solve for θ1. θ1 = arcsin[(n2*sin(θ2)) / n1]. By substituting the known values, we find θ1 = arcsin[(1.36 * sin(25.6°)) / 1.61].
By calculating this expression, we would obtain the angle of incidence in the glass in degrees.
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This is junior year english
Answers
Compared with the peak wavelength given off by the Sun, what ls the peak wavelongth given off by a hotter star?