In order to be considered an ion, an atom must have a

How does friction affect a machine efficiency?

The radius of the merry-go-round is 10 meters. The Chile has a mass of 40 kilograms. What is the child's moment of inertia

Two students are setting up an experiment to find the average velocity of one of their pet goldfish swimming from one side of its tank to the other.

What causes the curved, upper surface of water that commonly appears when using a graduated cylinder?

The sides of a square baseball diamond are 90 feet long. When a player who is between second and third base is 60 feet from second base and heading towards third base at a speed of 22 feet per second, how fast is the distance between the player and

A soap bubble usually pops because some part of it becomes too thin due to evaporation or drainage of fluid. The change in thickness also changes the color of light the bubble reflects. Why?

Earth's magnetic field is similar to that of a bar magnet. Select all the statements that are true as a consequence of this. A. It has a north and south magnetic pole. B. It has a bar-shaped iron section inside it. C.

What does electricity depend on to make electrons move? A:a source and the attraction to opposite charges B: Only source C:Only attraction of opposite charges

If two parallel light rays hit a plane mirror, what will be their orientation to one another after they reflect? a. they will remain parallel. b. they will be perpendicular. c. it depends on the initial spacing between the light rays. d.

To extend the electrical system between the main panel and the secondary panel, the electricians used A. Receptacles B. Circuit breakers. C. feeders. D. insulators