Flying saucers A and B fly between two planets as shown to the right. The planet
ID: 1794025 • Letter: F
Question
Flying saucers A and B fly between two planets as shown to the right. The planets are at rest with respect to each other. Flying saucer C is headed toward one of the planets along a different path, as shown. The longest dimension of each saucer is referred to as its width, and the shortest dimension is called its height. 0.775c P1 P2 0.958c For each length or time interval listed below, determine which observer or observers measure 0.677c the proper time interval or proper length The time of saucer A's trip between planets: The width of saucer B: The height of saucer A: The distance between the planets: C:Explanation / Answer
The time of saucer A's trip between platets --- only A. measures the proper time of saucer A between planets
The width of saucer B --only B measures the proper width of saucer B ( as B is moving along the direction of its width only B can measure its proper width )
The height of saucer A --- since A is not moving along its height it can be measured by P1 , P2 , A and B ( that is height of A is properly measured by P1 ,P2 , A and B )
The distance between the planets ---can be measured by P1 ,P2and C ( the planets are at rest , so C ,P1 ,P2 can measure the proper distance between the planets )