If you have a device that has an energy efficiency of 0.4 and you put in 100 units of energy, how many units of useful energy will you get out of it?

What is the wave speed in this equation Wave speed = frequency x wavelength

A light bulb has a resistance of 360. what is the current in the bulb when it has a potential difference of 120 v across it? 0.33 a 3 a 480 a 43,200 a

Which statement correctly compares sound and light waves? A. Both light and sound waves need matter to carry energy from one place to another. B. Neither light nor sound waves need matter to carry energy from one place to another. C.

If a lamp has a resistance of 50 ohms and is operated by a p. d. of 10V, find the current flowing through it

Describe the acceleration of your bicycle as you ride it from your home to the store

How many joules does a shortbread cookie have

What happens to frequency when an object is moving towards you?

What is the mid-atlantic ridge? how many miles does it stretch?

A basketball player jumps straight up for a ball. To do this, he lowers his body 0.260 m and then accelerates through this distance by forcefully straightening his legs. This player leaves the floor with a vertical velocity sufficient to carry him 0.

Why does Mars have moons even when its mass is small?