a 65 kg skater at rest on a frictionless rink throws a 2 kg ball, giving the ball a velocity of 7 m/s. What is the velocity of the skater immediately after

Describe J. J Thomson's plum pudding model, and explain how it compares to the modern day atomic theory.

The purpose of any simple machine is to allow a job to be done with less force than would normally be needed. However, when a string of simple machines are added together to accomplish a task, the overall efficiency of the machine decreases.

The region around an electric charge that will apply force to other charges

Which number is not rounded correctly? A. 0.0279 rounded to 0.028 B. 210.8 rounded to 210 C. 14.507 rounded to 14.510 D. 18.42 rounded to 18.4

Which of the following correctly describes the hierarchy that exists in the universe? A galaxy refers to all existing matter, energy, and space that is held together by gravity.

Which best describes the relationship between internal energy and thermal energy? Thermal energy is a measure of the internal energy of a substance. Internal energy is a measure of the thermal energy of a substance.

5. Consider two glasses, one filled with water and the other half-full, with the water in the two glasses being at the same temperature.

1. Why is the theory that all things are made up of atoms a theory and not a fact?

A 600 N astronaut travels to an asteroid where the gravitational force is one-hundredth that of Earth. What is the astronaut's weight on the asteroid?

The analysis of data leads to what