A light beam which is amplified into a strong concetrated beam of light is known as A) a laser. B) a transistor. C) a microwave oven. D) a light emitting diode.

Which star has the highest surface temperature? Group of answer choices Blue star Yellow star White star Red star

Which device is using a motor? A. A water heater creates heat energy from electric energy. B. A waterfall rotates a waterwheel to turn an axle. C. A body massager uses electric energy to move back and forth. D.

What distance must the block travel if the net work done on the block by f (x) and friction combined is to be exactly zero?

If we say that one object is under free fall motion what do we mean in physics

Rafael swings a baseball bat with a force of 25 N. The baseball bat exerts a force of 5 N on the baseball. What is the mechanical advantage of the baseball bat? The mechanical advantage of the baseball bat is

What type of change occurs when water changes from solid to a liquid

Definition of artficial and natural radioactivity

In order for an object to conserve it's total mechanical energy it is absolutely necessary that?

Your body is presently converting chemical potential energy from food into thermal energy at a rate of about 100 J/s, or 100 W. If heat were flowing out of you at a rate of about 200 W, would your body temperature go up or down?

Which energy depends the arbitrarily assigned zero level