1-When measuring angles of reflection or incidence how must the angles be measured? 2-What will happen to the angle of reflection as the angle of incidence increases?

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy

How do we measure or think of speed in the united states?