Please Help Me !! 1. To exercise for an hour, it takes 500 Joules of work. How much power will be needed?
2.How much work will be done on building a car if you use 20 watts of power for 60 minutes?

After the near spacecraft passed mathilde, on several occasions rocket propellant was expelled to adjust the spacecraft's momentum in order to follow a path that would approach the asteroid eros, the final destination for the mission. after getting close to eros, further small adjustments made the momentum just right to give a circular orbit of radius 45 km (45 × 10^3 m) around the asteroid. so much propellant had been used that the final mass of the spacecraft while in circular orbit around eros was only 545 kg. the spacecraft took 1.04 days to make one complete circular orbit around eros. calculate what the mass of eros must be.

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =