50 J of work was performed in 20 seconds. How much power was used to do this task? A. 4 W B. 24.5 W C. 0.4 W D. 2.5 W

What would be an example of chemical change that took a long time to occur

Which of the following is a correct order in which air moves through the human respiratory system when a person inhales? A. nose, larynx, trachea, pharynx, bronchi, lungs B. nose, pharynx, larynx, trachea, bronchi, lungs C.

Why does a pendulum eventually stop swinging?

Forms a thin layer of gases around earth

How are skyscrapers designed to battle wind?

The pressure at the bottom of a jug filled with water does not depend on

at what other angle will a thrown ball go the same distance as one thrown at an angle of 75 degrees?

A record player turntable initially rotating at 3313 rev/min is braked to a stop at a constant rotational acceleration. The turntable has a rotational inertia of 0.031kg? m2.

A steam engine does 12 kJ or work in 55 s. how much power does the engine produce?

What is the energy source that heats a contracting protostar?