Question

if the sun suddenly turned off, we would not know it until its light stopped coming. how long would that be, given that the sun is m away? use for the speed of light.

Answer 1

Your givens are not shown but the distance between earth and the sun is approximately 1.5 x 10^11 meters and the speed of light is approximately 3x10^8 m/s

For that light from the sun to reach earth, it will have to travel 1.5 x 10^11 meters at a speed of 3 x 10^8 m/s

We can use this equation
speed = distance/time

Solve for time

Time = distance/speed

Substitute

Time = (1.5x10^11)/(3x10^8) = 500 seconds
We can convert that to minutes:
500/60 = 8.3 minutes

Hope this helps