Describe two ways that radio waves and gamma rays are alike and how they are different

What is the measurement of how fast an object moves relative to a reference point?

Which one of the following terms is used to indicate the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line? velocity acceleration equilibrium force inertia

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped