What type of wave does not need matter to carry energy

Calculate the efficiency of an engine if the work input is 300. j and the work output is 100. j

The typical unit for a period used with Kepler's third law is

Name two elements that have similar properties. How can you tell using the periodic table?

A person pulls a cart with a force of 10n a distance of 8m how much work is done on this cart

How are magnetic field lines and electric field lines alike

Which statement about how light travels is true? A Light waves need a medium to travel, and they travel at the same speed even if the light source is moving.

Explain why the car reaches a top speed even though the thrust Force remains constant at 3500N

4. A helicopter is flying at a height of 1.5km. If it has 50MJ of G. P. E., what is the mass of the helicopter?

Unless otherwise posted, what is the speed limit in a school zone? florida

If you put in 10 J of work to push 1 c of charge against and electric field what will be its voltage with respect to its starting position? when released, what will be it's kinetic energy if it flies past it's starting position?