Review

Who developed the theory of relativity?

• Albert Einstein

• Isaac Newton

• Galileo Galilei

• Johannes Kepler

What is time dilation?

• The effect of gravity on the passage of time

• The slowing down of time due to motion

• The speeding up of time due to motion

• The warping of space and time by massive objects

What is length contraction?

• The effect of gravity on the shape of objects

• The stretching of space and time by massive objects

• The shortening of objects in motion relative to an observer

• The expansion of objects due to their velocity

What is the name of the effect where an object's mass increases as its speed approaches the speed of light?

• Time dilation

• Length contraction

• Mass-energy equivalence

• Mass dilation

Car A is moving with a speed of 10 m/s towards the east. Car B is moving 5 m/s east as well. what is the speed of car A according to car B?

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What is c?

• speed of air

• speed of wind

• speed of light

• speed of sound

A spacecraft 30 m long is moving with a speed of 0.6c. The length of the plane according to observers on earth is?

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What is the first postulate of special relativity?

• The laws of physics are the same for all observers in uniform motion relative to each other

• The speed of light in a vacuum is always the same, regardless of the motion of the source or observer

• Time appears to pass more slowly for observers moving at high speeds relative to stationary observers

• The mass of an object increases as its velocity approaches the speed of light

What is the second postulate of special relativity?

• The laws of physics are the same for all observers in uniform motion relative to each other

• The speed of light in a vacuum is always the same, regardless of the motion of the source or observer

• Time appears to pass more slowly for observers moving at high speeds relative to stationary observers

• The mass of an object increases as its velocity approaches the speed of light

the current measured by the ammeter is .... mA

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