What two characteristics do electromagnetic waves vary in?

If your friend asked, "why are plastics good insulators," what would be the best reply? electron flow is necessary for electrical current. plastics are able to readily accept electrons, and this makes them good insulators.

Choose the correct energy transformation for a rock falling from a cliff.

Faraday's Law states how voltage can be increased or decreased in a system. True False

How many electrons must be removed from an electrically neutral silver dollar to give it a charge of + 2.4 μC?

Why do two elements silver and iron have different properties

You slide a box of books at constant speed up a 30° ramp, applying a force of 200 n directed up the slope. the coefficient of sliding friction is 0.18.

Two trains leave the same station at the same time. The first train travels north at 60 mph. The second train travels west at 45 mph. Find how fast the distance between the trains is changing two hours after the trains have left.

If the room radius is 4.5 m, and the rotation frequency is 0.8 revolutions per second when the floor drops out, what is the minimum coefficient of static friction so that the people will not slip down?

Energy of motion is known as what energy

While a constant total force of 17 n is exerted on a cart, the cart's acceleration is 5 m/s2. find the mass of the cart?