20. What factor is more important in determining electrical force

21. Why do we need constants like k and G?

Describe how molecules enter and leave a cell without the use of the cell’s energy

Is fm radio a wave motion

As a 2.0-kg block travels around a 0.50-m radius circle it has an angular speed of 12 rad/s. The circle is parallel to the xy plane and is centered on the z axis, 0.75 m from the origin. The magnitude of its angular momentum around the origin is:

You can tell the difference between positively charged and negatively charged particles by passing them through an electrical field; the positively charged particles are repelled from the negatively charged particles are attracted to it 1. True 2.

How is ultraviolet light and infrared light alike? How are they different?

Compare and contrast between reflection and refraction

You push a friend sitting on a swing she has a mass of 50 kg and accelerates a rate of 4 m/s2 find the force you exerted

What must be true about tow objects if heat is flowing between them?

Will a 2 liter bottle of coke have a different density than a one liter bottle of coke?

A positive rod is placed to the left of sphere A, and the spheres are separated