What are two forces that are not equal in size?

Which of the following is not a use of electromagnetic waves? a night-vision bremote controls c x-rays d all are used of electromagnetic wavesbremote controls is not a use of electromagnetic waves?

A solid uniform-density sphere is tied to a rope and moves (without spinning) in a circle with speed 7 m/s. The distance from the center of the circle to the center of the sphere is 1.

Calculate the speed of a car in miles per hour that is flashed on a speed camera covering a 20m distance in 0.5 seconds.

How much ice can you meltheat with 1000 calories of heat?

1. A certain atom has 20 electrons, 21 neutrons, and 20 protons. What is the atomic mass of the atom?

A grocery shopper tosses a (n) 9.1 kg bag of rice into a stationary 19.3 kg grocery cart. The bag hits the cart with a horizontal speed of 6.6 m/s toward the front of the cart. What is the final speed of the cart and bag? Answer in units of m/s.

Where do most metamorphic rocks processes take place?

A 13,500 kg railroad freight car travels on a level track at a speed of 4.5 m/s. It collided and coupled with a 25,000 kg second car, initially at rest and with brakes released. What is the speed of the two cars after collision

What type of waves move energy forward, but the source makes up and down

Why do helium balloons float? Talk about density of atoms and compare to elements in the air.