Which type of wave is used in cell phone communication and radar devices?

A. Light waves

B. Gamma waves

C. Infrared waves

D. Microwaves

What force keeps an object moving in a circle

Why does charging by rubbing happens best in dry weather?

How can you predict the action of the element

Charges a and b in the figure are equal. each charge exerts a force on the other of magnitude f. suppose the charge of b is increased by a factor of 4, but everything else is unchanged.

After setting up stereo speakers in your schools music room, you notice that in certain areas of the room, the sound from the speakers is very loud. In other areas, the sound is very soft.

What is the result of a mutation during replication A: the strands are different B: the strands are identical c: the strands are broken D: the strands are continuous

What is ___ heating of a liquid__ gas to liquid

A gate in an irrigation canal is constructed in the form of a trapezoid 2 m wide at the bottom, 38 m wide at the top, and 2 m high. It is placed vertically in the canal so that the water just covers the gate.

A machine with a mechanical advantage of 10 is used to produce an output force of 250 newtons. What input force is applied to this machine

Why do you float in space