An element is a substance composed of atoms that all have the same number of protons.

A. True

B. False

A cylinder of diameter 100 mm rolls from restdown a 5 m long ramp and its center of mass is moving with velocity 2 m/s at the bottom of the ramp. (a) What is its (constant) acceleration down the ramp? (b) What is its angular acceleration?

What part of a longitudinal wave has the lowest density?

In a crystal of salt there are electrons and positive ions. How does the net charge of the electrons compare with the net charge of the ions?

How is wind direction indicated on a weather map?

Which drawing would correctly show the magnetic field around a bar magnet?

Why do marine west coast climates have much precipitation

Wright true or false: 1. A baseball has more momentum than a tennis ball traveling at the same speed. 2. A light ball has more inertia than a heavy ball 3. The less momentum a bowling ball has, the easier it is for that ball to knock down pins. 4.

The interference of two sound waves of slightly different frequencies produces

8. A force of 80 pounds on a rope is used to pull a box up a ramp inclined at 100 from the horizontal. The rope forms an angle of 330 with the horizontal. How much work is done pulling the box 25 feet along the ramp?

A raindrop has a mass of 5.4 * 10-7 kg and is falling near the surface of the earth. Calculate the magnitude of the gravitational force exerted (a) on the raindrop by the earth and (b) on the earth by the raindrop.