The observed relativistic length of a super rocket moving by the ...

[B]

The observed relativistic length of a super rocket moving by the observer at 0.57c will be what factor times that of the measured rocket length if it were at rest?
 a. 0.82
  c. 1.4
  b. 0.45
  d. 0.71

Question 2

A spaceship is moving away from an observer at relativistic speed. Its length at rest is 100 m, but the observer measures its length as 67 m. A time interval of 100 s on the spaceship would be measured by the observer to be which of the following?
 a. 200 s
  c. 50 s
  b. 150 s
  d. 100 s

[dawsa925]

Answer to Question 1

A

Answer to Question 2

B

[B]

Thank you!

[dawsa925]

Always glad to help...