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makkiz [27]
3 years ago
12

Which describes Einstein’s second postulate about the special theory of relativity? The speed of light in a vacuum is constant,

and nothing is faster than the speed of light. The speed of light in a vacuum is constant, and some things are faster than the speed of light. The speed of light in a vacuum fluctuates, but nothing is faster than the speed of light. The speed of light in a vacuum fluctuates, and some things are faster than the speed of light.
Physics
2 answers:
crimeas [40]3 years ago
5 0

Answer:A

Explanation:

denis23 [38]3 years ago
4 0

Answer:

A

Explanation:

EDG 2021

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Calculate the work WC done by the gas during the isothermal expansion. Express WC in terms of p0, V0, and Rv.
mote1985 [20]

Complete Question

The complete question is shown on the first and second uploaded image

Answer:

The expression is  W_c =  P_o V_o ln (R_v)  

Explanation:

Generally smallest workdone done by  a gas is mathematically represented as

          dW  =  PdV

Generally for an isothermal process

    PV  =  nRT = constant

=>   P = \frac{nRT}{V}

Generally the total workdone is mathematically represented as

   W_c =  \int\limits^{v_f}_{V_o} {\frac{nRT}{V} } \, dV

=> W_c = nRT  \int\limits^{V_f}_{V_o} {\frac{1}{V} } \, dV

=>  nRT [lnV]   | \left \ {V_f}} \atop {V_o}} \right.

=>  W_c = nRT [ln(V_f) - ln(V_o)]

=>  W_c = nRT ln \frac{V_f}{V_o}

From the question \frac{V_f}{V_o }  =  R_v

=> W_c =  P Vln (R_v)

at initial  state

W_c =  P_o V_o ln (R_v)  

7 0
3 years ago
As the bright sun shines upon the water, the water slowly disappears. The same sunlight gives energy to the surrounding plans to
mariarad [96]

first is physical .... sec chem

8 0
4 years ago
Clothes dryer uses about 3:00 amps of current from a 240-volt line how much power does it use
kirill115 [55]

Electrical power is defined as

P = I * V

I = 3 amperes

V = 240 volts

Power = 3 * 240

Power = 720 Watts. Answer

4 0
3 years ago
Given the force diagram of the basketball, what can you tell about the basketball motion?
VARVARA [1.3K]

Newton's laws allow to find the result for the movement of the basketballl:

  • On the vertical axis the ball is on the ground.
  • On the horizontal axis the ball is accelerating in the direction of the pushing force.

Newton's laws establish the relationship between the forces on objects:

  • The 1st law states that if the net force is zero the object is stationary or with constant speed.
  • The 2nd law gives a relation of the force with the mass and the acceleration of the body.
  • The 3rd. Law states that the force appears in pairs, one on each body with the same magnitude, but in the opposite direction.

Let's apply these principles to the ball's motion diagram.

The two vertical forces are in the opposite direction, one is due to the weight of the body and the other is the attraction of the earth to the support of the ball, they are of equal magnitude, not their action-reaction force and reluctant because it is applied to the same body

       In conclusion we can say that the ball is on the ground.

The two horizontal forces are in the opposite direction, the thrust force is greater than the friction therefore using Newton's second law the ball must be accelerating in the direction of the thrust force.

       In conclusion we can say that the ball is accelerating in the direction of the pushing force.

In conclusion using Newton's laws we can find the result for the motion of the basketball:

  • On the vertical axis the ball is on the ground.
  • On the horizontal axis the ball is accelerating in the direction of the pushing force.

Learn more about Newton's laws here:  brainly.com/question/3715235

8 0
3 years ago
What is the difference between pulse and periodic waves, and what is the difference between transverse and longitudinal waves?
stiv31 [10]

<u>Difference between pulse and periodic waves:</u>

A pulse wave is a sudden disturbance in which only one wave or a few waves are generated, such as in the example of the pebble. Thunder and explosions also create pulse waves. A periodic wave repeats the same oscillation for several cycles, such as in the case of the wave pool, and is associated with simple harmonic motion. Each particle in the medium experiences simple harmonic motion in periodic waves by moving back and forth periodically through the same positions.

<u>Difference between longitudinal and transverse waves:</u>

A transverse wave propagates when the disturbance is perpendicular to the propagation direction. An example of a transverse wave is where a woman moves a toy spring up and down, generating waves that propagate away from herself in the horizontal direction while disturbing the toy spring in the vertical direction.

In a longitudinal wave, the disturbance is parallel to the propagation direction. Example of longitudinal wave is where the woman now makes a disturbance in the horizontal direction—which is the same direction as the wave propagation—by stretching and then compressing the toy spring.

7 0
4 years ago
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