Question

A certain star is 79.3 lightyears away. How many years would it take a spacecraft traveling .929c to reach that star from earth, as measured by observers on earth?

Answer 1

t = 85.36 years

Step-by-step explanation:

given,

distance of star = 79.3 lightyears

speed of the space craft = 0.929 c

time = ?

we know,

distance = speed x time

`t = (d)/(v)`

`t = (79.3* (9.461* 10^(15)\ m)/(1 \ light year))/(0.929 * 3 * 10^8)`

t = 269.199 x 10⁷ s

`t = (269.199* 10^7)/(365* 24 * 60 * 60)`

t = 85.36 years

time taken by the space crafty to reach star is equal to 85.36 years.