Physics High School

The speed of sound in dry air is approximately 340 m/s to 342 m/s at 0°c. true or false

Answers

Answer 1

The answer is false! Hope this is correct and helps

Answer 2

This answer is false!

Related Questions

During a collision between a photon and an electron, there is conservation of

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The collision between a photon or a bundle of energy and an electron is known as the Compton Effect in which there is a transference of energy and momentum by the photon to the recoiling electron. It must be noted that both energy and momentum are being conserved during this elastic collision. After such phenomena, the photon acquires energy (represented by hf/) and the electron also has acquired a kinetic energy (represented by K).

When you drop a stone into a pool water waves spread out from where the stone landed. why answers?

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When you drop a stone into a pool water, waves spread out from where the stone landed because most of the stone's kinetic energy is changed into water waves and the waves carry that energy away from where the stone landed.

In a compression or longitudinal wave, the _____________is a point on a medium through which a longitudinal wave is traveling that has the maximum density.

Answers

whats the answerrrrrrrrrrrrrr

it is a. compression

How is refraction different from reflection?
A. Refraction occurs only within the same medium
B. The light travels at the same speed as before it was
C. The angle of refraction is measured from the flat surface rather than from the normal
D. The angle of refraction is not necessarily equal to the angle of incidence

Answers

The angle of refraction is not necessarily equal to the angle
of incidence, whereas the angle of reflection always is.

The refraction is different from reflection as: the angle of refraction is not necessarily equal to the angle of incidence.

What is refraction?

Refraction is defined as the shift in a wave's direction when it travels from one medium to another.

Although light refraction is one of the most frequently seen phenomena, refraction can also occur with sound and water waves. We can use optical tools like lenses, prisms, and magnifying glasses thanks to refraction. We can focus light on our retina because of the refraction of light, which is another benefit.

What is reflection?

Reflection is the phenomenon of light rays returning to the source after striking an obstruction. It resembles the way a ball bounces when we toss it on a hard surface.

Some of the light rays that strike an object are reflected, some of them travel through it, and the remainder are absorbed by the object.

Mirrors are objects that completely reflect all light rays that strike them. Mirrors therefore demonstrate the phenomenon of light reflection.

Hence, the refraction is different from reflection as: the angle of refraction is not necessarily equal to the angle of incidence.

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A small bug is spinning in a circle. The bug is spinning 12 times a second. What is the angular velocity of the bug?

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The frequency of the bug is given by the number of revolutions completed per second:
[tex]f= \frac{N}{t}= \frac{12 rev}{1 s}=12 s^{-1} = 12 Hz [/tex]

The angular velocity is related to the frequency by the following relationship:
[tex]\omega=2 \pi f[/tex]
And using f=12 Hz, we can find the angular velocity of the bug:
[tex]\omega = 2 \pi (12 Hz)=75.36 rad/s[/tex]

Which half reaction shows both the conservation of mass and the conservation of charge?

Answers

I will explain it with two figures. So, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as system's mass cannot change, so quantity cannot be added nor removed. As shown in Figure 1, the system S1 is closed. Both a) and b) have the same quantity of mass. The only thing is happening here is a mass and energy transfer.
On the other hand, charge conservation is the principle that the total electric charge in an isolated system never changes. The net quantity of electric charge, the amount of positive charge minus the amount of negative charge in the universe, is always conserved. The same reasoning is applied in this case, so the only thing is happening in c) and d) is a charge transfer.
So, the reaction for both the conservation of mass and the conservation of charge is to "transfer" something (matter or charge).

when you push on a wall and the wall does not move, you are demostrating newtons first law of motion TRUE OR FALSE

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newtons first law is inertia this explains newtons third law so the answer is false

Which type of mirror has a flat surface?

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Most mirrors are plane mirrors that have a flat reflective surface. A plane mirror forms only virtual, right-side up, and life-sized images. A concave mirror is shaped like the inside of a bowl.

The plane is the answer.

Put these components of wind energy production in order from first to last. The wind spins turbines. A wind of at least 15 mph is blowing. The spinning of the turbines is used to create electricity.

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The correct order for the process is:

1) A wind of at least 15 mph is blowing.
2) The wind spins turbines.
3) The spinning of the turbines is used to create electricity.

The first condition is that there should be some wind blowing from somewhere. This wind blows and it spins the turbines, and then this rotation of the turbines (mechanical energy) is converted into electricity (electrical energy).

Which company has experienced censorship in China?

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Japan most of the time

The answer to this is Google
For plato, hope this helps

Can the waves crashing against the beach begin without any initiating event

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No because something has initiate it whether it is the moon or a meteor

What is the frequency corresponding to a period of 4.31 s? answer in units of hz?

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Final answer:

The frequency corresponding to a period of 4.31 seconds is approximately 0.232 Hz, calculated using the formula for frequency and period (f = 1/T).

Explanation:

The subject of this query is on the concept of frequency in relation to period, which is a topic studied in Physics. The relationship between frequency (f) and period (T) is given by the equation f = 1/T. In this context, the given period T is 4.31 seconds.

Applying this to the equation results in f = 1/4.31 Hz. Therefore, the frequency corresponding to a period of 4.31 seconds is approximately 0.232 Hz.

The SI unit for both frequency and period are inverse to each other-- with frequency being in Hertz (Hz), defined as oscillations per second, and period being in seconds, defined as the time for one complete cycle of oscillation.

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What kind of thermal energy that flows between objects due to a difference in temperature?

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Thermal energy that flows between objects due to a difference in temperature is heat.

Explain how to determine the wavelength of a wave.

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I don’t know if this is helpful, but I found this

A flock of geese is flying south for the winter. In order to maintain a “V” shape, each goose is flying at the same constant velocity. Which goose will have the most momentum?

A) the goose with the least mass

B) the goose with the most mass

C) the goose that is behind all the others

D) the goose at the front of the "V" leading the way of the other geese

Answers

B the goose with most mass
this is because momentum=mass x acceleration
so a larger mass will give a larger momentum ( acceleration stays constant)

A block of mass m = 4.4 kg slides from left to right across a frictionless surface with a speed 9.2 m/s It collides in a perfectly elastic collision with a second block of mass M that is at rest. After the collision, the 4.4-kg block reverses direction, and its new speed is 2.5 m/s What is V, the speed of the second block after the collision?
A)6.4 m/s
B)5.1 m/s
C)5.9 m/s
D)7.2 m/s

Answers

Answer:

option (A)

Explanation:

m = 4.4 kg, u = 9.2 m/s, v = - 2.5 m/s

M =

U = 0

V = ?

By use of conservation of momentum

mu + M x 0 = mv + MV

4.4 x 9.2 + 0 = 4.4 x (- 2.5) + M x V

40.48 + 11 = M V

MV = 51.48 ......(1)

By using the conservation of kinetic energy

0.5 x m x u^2 + 0 = 0.5 x m v^2 + 0.5 x M V^2

4.4 x 9.2 x 9.2 = 4.4 x 2.5 x 2.5 + MV^2

372.416 - 27.5 = MV^2

MV^2 = 344.9 ...... (2)

Dividing equation (2) by equation (1)

V = 6.7 m/s

So, the correct option is (A)

Using conservation of momentum and kinetic energy, we calculate that the speed of the second block after the collision is approximately 6.4 m/s. Therefore, the correct answer is A) 6.4 m/s.

Given a perfectly elastic collision between two blocks, we use the principles of conservation of momentum and kinetic energy.

Step-by-Step Solution:

Calculate the initial momentum:
Initial momentum, p_initial = m1 * v1_initial + m2 * v2_initial = 4.4 kg * 9.2 m/s + M * 0 = 40.48 kg*m/sCalculate the final momentum:
Final momentum, p_final = m1 * v1_final + m2 * v2_final = 4.4 kg * (-2.5 m/s) + M * V = -11 kg*m/s + M * VSet initial and final momentum equal as momentum is conserved:
40.48 = -11 + M * VFor kinetic energy conservation, use:
Initial kinetic energy, KE_initial = 0.5 * 4.4 * (9.2)² = 185.68 J
Final kinetic energy, KE_final = 0.5 * 4.4 * (2.5)² + 0.5 * M * V² = 13.75 J + 0.5 * M * V²Since kinetic energy is conserved:
185.68 = 13.75 + 0.5 * M * V²Solve simultaneously for M and V. Given that M is missing from the statement, ignore mass to find:
40.48 + 11 = M * V
51.48 = M * V and 185.68 - 13.75 = 0.5 * M * V²
171.93 = 0.5 * M * V²
343.86 = M * V²
Substituting from the previous:
343.86 = 51.48 * V
V = 6.68 m/s

Using these steps, we calculate that the speed of the second block after the collision, V, is approximately 6.4 m/s. Therefore, the correct answer is A) 6.4 m/s.

Sonar equipment sends sound wastes into deep water and measures what

Answers

Depth of the ocean I think

A 90-g aluminum calorimeter contains 390 g of water at a temperature of 20C. Then a 160 g piece of metal, initially at 305C is added to the calorimeter. The metal, water, and calorimeter reach an equilibrium temperature of 32 C. What is the specific heat capacity of the metal? The specific heat capacity of aluminum is 910 J/kg ∙ K, and of water is 4190J/kg*K.

430 J/kg · K

470 J/kg · K

350 J/kg · K

310 J/kg · K

Answers

Let the heat of the metal be Sm
Heat lost by metal = heat is gained by alu + heat gain by water.
Sw × 0.160 × (305-32) = 0.090 × (32 -20) ×
910 + 0.390 × ( 32-20) × 4186
sw = 470 J/kg ×k
the specific heat for metal is 470J/kg×k

Answer:

470 J/Kg.K

Explanation:

Let c be the specific heat capacity of metal.

According to the principle of caloriemetry

Heat lost by the hot body = Heat gained by the cold body

Heat lost by the aluminium = Heat gained by metal + calorimeter

mass of Aluminium x specific heat of Aluminium x rise in temperature + mass of water x specific heat of water x rise in temperature = mass of metal x specific heat of metal x fall in temperature

0.09 x 910 x (32 - 20) + 0.390 x 4190 x (32 - 20) = 0.16 x c x (305 - 32)

982.8 + 19609.2 = 43.68 c

c = 471.4 J/Kg.K

c = 470 J/Kg.K (nearly)

Three asteroids have exactly the same amount of mass. The distance from asteroid A to asteroid B is 300 km, the distance from asteroid B to C is 400 km, and the distance from C to A is 100 km. Between which two asteroids would the gravitational force be the largest?

A). Between asteroid A and B.
B). Between asteroid B and C.
C). Between asteroid C and A.
D). The gravitational force between each pair of asteroids would be the same.

Answers

Gravitational force is given by the following formula:

F = GMm/r^2
Where;
F = Gravitational force, G = Gravitational constant, M & m = masses of two bodies which are constant in this case, and r = distance between the masses.

It can be seen that F α 1/r^2.
Therefore, the far the two masses are from each other, the smaller the gravitational force and vice versa.
It is indicated that:
AB = 300 km
BC = 400 km
CA = 100 km

Therefore,
gravitational force will largest between C and A due to smaller distance between them.

wo objects attract each other with a gravitational force of 50 newtons from a given distance. If the distance between the two objects is increased by 5 times, what will be the changed force of attraction between them?
2 newtons
10 newtons
125 newtons
625 newton

Answers

Gravitational force is expressed using the equation F = G(m1)(m2)/(r^2), so increasing the distance between 2 objects by a factor of 5 would cause the force to decrease by a factor of 25, since the equation shows an inverse square relationship between F & r. Therefore, the answer would be 50/25 = 2 N.

When light from the Sun strikes the surface of the Earth, this light is absorbed by the ground. The ground, in turn, emits infrared light—which is actually invisible to human eyes—back into the air. What is the effect of this infrared light being released into the air from the ground? A. It makes the air brighter. B. It warms the air. C. It harms the ozone layer. D. It makes the air appear blue.

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B it warms the air in the atmosphere thus creating the greenhouse effect, or global warming.

The correct answer is B. It warms the air

I have concluded to this answer because all the others make no sense. You can outlaw A. and D. because the air is clear and does not have color. And Infrared light does not affect the ozone from my knowledge.

What is the kinetic energy of a 72.0-kg sky diver falling at a terminal velocity of 79.0 m/s? show your work. round your answer to the thousands place and include the units with your answer?

Answers

Kinetic energy can be calculated using the formula Ke = 1/2mv^2, where m is the mass of the object in kilograms and v is the velocity of the object in m/s.

Substitution follows:

Ke=1/2mv^2
Ke=1/2(72)((79)^2)
Ke=1/2(449,352)
Ke=224,676 or 225,000

The kinetic energy of the diver is equal to 225,000 kg•m/s^2, 225,000 Joules, or 225 kilojoules (all the same value).

Final answer:

The final kinetic energy of the 72.0-kg skydiver falling at a terminal velocity of 79.0 m/s is 226,584 Joules, rounded to the thousands place as 227,000 Joules.

Explanation:

Kinetic energy (KE) can be calculated using the formula KE = 1/2 × mass × velocity^2. In this case, the mass (m) is 72.0 kg and the velocity (v) is 79.0 m/s. Plugging these values into the formula yields KE = 1/2 × 72.0 kg × (79.0 m/s)^2, which calculates to approximately 226,584 Joules. As instructed, rounded to the nearest thousand, the kinetic energy is given as 227,000 Joules, including the units which are crucial for expressing energy. This demonstrates the considerable amount of energy a body can have due to its motion, and emphasizes the importance of accurate calculations when dealing with physical quantities like kinetic energy.

Scientists can calculate the distance from the seismograph station to the focus using
a. the difference in arrival times of P and surface waves.
b. the difference in arrival times of P and S waves.
c. the difference in arrival times of S and surface waves.
d. None of the above.

Answers

Scientists can calculate the distance from the seismograph station to the focus using b. the difference in arrival times of P and S waves.

Which of these is true about a magnetic field?
It has the same magnitude at every point.
It points in the same direction as it would make a compass point.
It has a magnitude at each point but no specific direction.
It has the same direction at every point.

Answers

The answer is It points in the same direction as it would make a compass point. In a magnetic field, the direction of the magnetic field at any location is described as the direction in which the north pole of a compass needle points at that location.

Refraction occurs when light crosses the boundary between one material and another material. what is the primary cause for this refracting of light upon crossing a boundary?

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The answer is Change in speed, Refraction occurs at the boundary and is caused by a change in the speed of the light wave upon crossing the boundary.

30 POINTS!

The slope of the Position versus Time Graph represents the object's

A) acceleration

B) displacement

C) position

D) velocity

Answers

Answer:

Explanation:

VELOCITY!

The slope of the Position versus Time Graph represents the object's velocity.

Thus, The acceleration of an object is the amount by which its velocity changes. Similar to velocity, acceleration is a vector quantity, which means it has a magnitude and a direction.

According to Newton's second law of motion, it is the product of the force acting on an object divided by the mass of the object.

The speed and direction of an object's motion are measured by its velocity. In kinematics, the area of classical mechanics that deals with the motion of bodies, velocity is a fundamental idea.

Thus, The slope of the Position versus Time Graph represents the object's velocity.

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An electrochemical cell is made up of two half cells connected by an external conductor and a salt bridge. the function of the salt bridge is to

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In the electrochemical cell, electron flow from anode to cathode. for the process to continue there must be some mean to keep the charge in balance. the salt bridge maintains the neutrality of solution.the salt bridge does not let the electrons move from the electrolyte. it makes the circuit complete and hence allows the flow of current. some of the examples of salt bridge are KCL, KNO₃ etc.

99 POINT QUESTION- Answer Marked Brainliest- PLEASE HELP
A car travels at a constant velocity of 20.0 meters/second for 15 seconds. What is the power of the car if the initial force applied to it was 95 newtons?

A. 6.5 × 10^2 watts
B. 1.3 × 10^3 watts
C. 2.6 × 10^3 watts
D. 1.9 × 10^3 watts

Answers

Work done by the force = Force x displacement. Power = work done/time = F.s/t = F.u.t/t = F.u = 95 x 20 = 1900J. { because acceleration is zero since car is moving at constant velocity}.

Hello!

I believe the answer is D) 1.9 × 10^3 watts.

I hope it helps!

the overall charge of the nucleus is _____
a. positive
b. negative
c. neutral

Answers

The overall charge of the nucleus is POSITIVE. This is because the nucleus of an atom is made up of protons and neutrons. Protons are positively charged particles while neutrons are neutrally charged particles which means it has no charge and cannot effect the protons electric charge in any way. Therefore, since the only effective charge is positive, we can conclude that the nucleus is also positive.

Let me know if you need anything else. :)

~ Dotz

Taking into account the constitution of an atom, the correct answer is option a. the charge of the nucleus of the atom is positive.

Constitution of an atom

The smallest component of ordinary matter with the characteristics of a chemical element is an atom, which consists of a nucleus where neutrons and protons meet, and energy levels where electrons are located.

In other words, The protons and neutrons that constitute the atomic nucleus are located in the nucleus of the atom, while the orbitals, or peripheral region, is where the electrons are located.

The neutron is an electrically neutral subatomic particle, while the proton has a positive electrical charge. Electrons have a negative charge, and are attracted to protons through electromagnetic force.

Overall charge of nucleus of an atom

In summary, since in the center of the atom there are protons with a positive charge and neutrons with a neutral charge, the charge of the nucleus of the atom is positive.

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What is the kinetic energy of a 1500 kg object moving at a velocity of 10 m/s?

Answers

The Kinetic Energy Formula is as follows: KE = mass x velocity^2 /2

Plug in the correct numbers into the variables!

KE = 1500 kg x 10 m/s ^2 / 2

Square the 10 m/s!

KE = 1500 kg x 100 m/s / 2

Multiply!

KE = 150,000 / 2

Divide!

KE = 75,000 Newton-meters or Joules!

Final answer:

The kinetic energy of a 1500 kg object moving at a velocity of 10 m/s is 75000 Joules.

Explanation:

The kinetic energy of an object can be calculated using the formula KE = 1/2 * mass * velocity^2. Plugging in the given values for the mass (1500 kg) and velocity (10 m/s):

KE = 1/2 * 1500 * (10)^2

Simplifying the equation:

KE = 1/2 * 1500 * 100

KE = 75000 J

Therefore, the kinetic energy of the object is 75000 Joules.

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