A Subaru WRX speeds off from a red light and achieves a speed of 23.5 m/s in 8 seconds. If the mass of the car is 2,100 kg, what force was applied to the car if this
speed was achieved in a distance of 63 meters?

Which type of wave can travel without a medium

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

Light from the sun reaches the earth in 8.3 minutes. the velocity is 3.00 x 10^8 m/s. how far is earth from the sun? i know how to get to d = (3 x 10^8 m/s)(498 sec). i just don't know how to get from there to the answer being 1.5 x 10^11 m.