9 Questions

Questions and Answers

- 1.Define proper time.
- 2.Define proper length
- 3.A space 100m long space ship travels to planet X which is a distanace of 6E11m from Earth. It travels at 90% of the speed of light. What is the value to 2dp of the Lorentz factor (gamma)
- A.
1.2

- B.
2.3

- C.
3.4

- D.
4.5

- 4.A space 100m long space ship travels to planet X which is a distanace of 6E11m from Earth. It travels at 90% of the speed of light. How long will this journey take according to the observer on the earth?
- A.
1111s

- B.
2222s

- C.
3333s

- D.
4444s

- 5.
- A.
Observer on the earth

- B.
Pilot of space ship

- C.
Another independent observer

- D.
The cosmic time keeper

- 6.A space 100m long space ship travels to planet X which is a distanace of 6E11m from Earth. It travels at 90% of the speed of light. Calculate the time taken for the voyage according to the pilot of the space ship.
- A.
1111s

- B.
966s

- C.
822s

- D.
733s

- E.
544s

- 7.
- A.
Pilot on space ship

- B.
Observer on the Earth

- C.
Independent observer

- D.
Great Galactic time measurer

- 8.A space 100m long space ship travels to planet X which is a distanace of 6E11m from Earth. It travels at 90% of the speed of light. Calculate the distnace from Earth to Planet X according to the travelling spaceship?
- A.
6E11m

- B.
3.31E11m

- C.
2.61E11m

- D.
1.42E11m

- E.
1.21E11m

- 9.