Radiation present in the environment but not produced by humans is called .

A1,700kg car is being used to give a 1,400kg car a push start by exerting a force of 140n the impulse on the smaller car during the 30.0s of contact is +670kg*m/s. what is the impulse of the smaller car on the larger car? -814 kg*m/s 0kg *m/s -670kg*m/s -550kg*m/s

What is the relationship between the direction of motion of the balloon and the wind currents

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?