What chemical changes could happen to the copper statue if it is left outside

Why does the input force have to be greater than the force needed to lift the bale?

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

An object has a weight of 500 on earth what is the mass of this object