Please answer all parts. Thanks! Class Management I Help CH28 Second Pass HW Beg

Question

Please answer all parts. Thanks!

Class Management I Help CH28 Second Pass HW Begin Date: 1/17/2017 12:00:00 AM -Due Date: 4/23/2017 11:59:00 PM End Date: 5/12/2017 11:59:00 PM (50%) Problem 2: Suppose there is an astronaut who is traveling at a significant fraction of the speed of light. Randomized Variables d 4.2 ly v 0.96444 c & 50% Part (a) How long, in years, does it take the astronaut to travel 4.2 ly at 0.96444c (as measured by the Earth-bound observer? 50% Part How long does it take according to the astronaut in years? Grade Summary 4 to Deductions 0% Potential 100% sino coso tano I 7 8 9 Submissions Attempts remaining: cotan0 asino acos0 4 5 6 (0% per attempt) 1 2 3 atan0 acotano sinh0 detailed view 0% cosho tanho cotanh0 oDegrees Radians Submit Hint I give up! Hints: deduction per hint. Hints remaining: 4 Feedback: 0 deduction per feedback.

Explanation / Answer

part a )

t = distance/speed = d/v

t = 4.2 ly/0.96444c

t = 4.35 years

part b )

L = Lo/y

y = 1/sqrt(1-(v/c)^2)

Lo = 4.2 ly

v = 0.96444c

L = 1.11 ly

t = L/v = 1.15 years

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