The total power input to a pumped storage power station is 600 MW

The useful power output is 540 MW calculate the efficiency of this pumped storage power station

During any process, the net electric charge of an isolated system does not change.

A 3.0 kilogram object is acted upon by an impulse having a magnitude of 15 Newton•seconds. What is the magnitude of the objects change in momentum due to this impulse?

Which one of the following substances is a liquid fuel used in rocket engines? A. Codium nitrate B. Ammonia C. Potassium perchlorate D. Liquid oxygen

A small rescue helicopter has 4 blades, each 4m long and 50kg in mass, and it carries a load of 1000kg. a) Find the rotational kinetic energy in the blades when rotating at 300 rpm.

In which part of the scientific method do you sum up your results

A car traveling 26 m/s starts to decelerate steadily. It comes to a complete stop in 13 seconds. What is it's acceleration. ___m/s^2

Less work was done. What is one possible reason why this has happened? A. There was more force applied; therefore, there was less movement. B. There was less force applied; therefore, there was more movement. C.

What are the optimal conditions for using a solar oven?

What is the magnifying power of an astronomical telescope using a reflecting mirror whose radius of curvature is 5.5 mm and an eyepiece whose focal length is 2.9 cmcm? Follow the sign conventions.

Who was the first person to observe a sign of molecular motion?