What has alternating electric and magnetic fields that travel in the form of a wave?

A car starts from rest, then accelerates at 1.20 m/s^2 fo 7.00 s. It hits the brakes, slowing to a stop at a rate of - 4.25 m/s^2. What is the total time for the problem? (Unit = s)

Which sphere is NOT a part of the cycling of oxygen through Earth's systems? A. biosphere B. exosphere C. atmosphere D. hydrosphere

The universe is believed to have been form from a very dense fireball billions of years ago.

With certain exceptions, Class E airspace extends upward from either 700 feet or 1,200 feet AGL to, but does not include, A) 14,500 feet MSL. * B) 18,000 feet MSL. C) 10,000 feet MSL.

If atoms are made up of smaller particles, such as protons, neutrons, and electrons, then why are atoms considered the smallest particles of an element?

1) What happens when two negatively charged tape strips are placed near each other?

Claudia throws a baseball to her dog. Which free-body diagram shows the baseball when it's flying horizontally in midair? (Assume no air resistance.)

What causes an air conditioned to turn on

A turntable is spinning on a frictionless axle when a ball of putty is dropped onto it from above. The putty sticks to the turntable when it lands. Is angular momentum conserved for the turntable and putty (the system) during this process?

The speedof a boat in still water is v. The boat is to make a round-trip ina river whose current travels at speed u.