Theoretical Physics

1.Gloria is in a spaceship moving with constant velocity 50% of the speed of light and detects Andy’s spaceship in the distance. If Andy and Gloria are indeed in equivalent reference frames, which of the following must be true?

Select one:

A. THEIR CLOCKS IN BOTH REFERENCE FRAMES MOVE AT THE SAME RATE.

B. THE LENGTH OF A LADDER ALONG THE DIRECTION OF MOTION IS THE SAME.

C. PHYSICAL LAWS IN BOTH REFERENCE FRAMES ARE THE SAME.

D. A BULLET FIRED FROM THE FRONT OF EACH SHIP HAS THE SAME SPEED.

2. In our everyday lives how often do we encounter effects of time dilation?

Select one:

A. NEARLY CONSTANTLY WHEN LOOKING AT SPEED AND MOTIONS OF OBJECTS AROUND US

B. ALMOST NEVER AS NEARLY ALL OBJECTS AROUND US MOVE MUCH SLOWER THAN LIGHT

C. ROUGHLY HALF OF THE OBJECTS WE SEE UNDERGO SOME SIGNIFICANT TIME DILATION.

D. WE NEVER ENCOUNTER TIME DILATION EFFECTS; IT IS ALL JUST THEORETICAL PHYSICS.

3. Clock A and Clock B are synchronized and then Clock B is placed on a spaceship departing Earth at 80% the speed of light while Clock A stays on Earth. Of the two clocks which clock shows the correct time?

Select one:

A. BOTH CLOCK A AND CLOCK B ARE CORRECT.

B. CLOCK A IS CORRECT AND CLOCK B IS WRONG.

C. CLOCK B IS CORRECT AND CLOCK A IS WRONG.

D. NEITHER CLOCK IS CORRECT.