How can you tell whether something has kinetic energy?

A10.0 kg cart and a 15kg cart are locked together with a compressed spring between them. they are then released so that the spring pushes the two carts apart. the 10.0 kg cart is moving at 4.5 m/s afterward. how fast is the 15kg cart moving? 3.0 m/s 2.0 m/s 4.5 m/s 5.0 m/s

Determine the maximum r-value of the polar equation r =3+3 cos 0

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages