Define efficiency in your own words

When moving a negative charge closer to a positive charge source, which of the following happens

What is an organelle that contains DNA?

The function x = (3.0 m) cos[ (3πrad/s) t + π/4 rad] gives the simple harmonic motion of a body. at t = 6.

What would increase the rate of heat exchange between an animal and its environment?

A boy jogs 250 meters in 110s what is the average speed

What does it mean that a form of energy might take more energy to harness than it provides? Are renewable resources always renewable, or can they become non-renewable? Why aren't renewable resources used for everything that we use energy for?

What would a sound wave do if it traveled from a gas to a liquid? •stop •stay the same speed •slow down •speed up

A rock is thrown downward into a well that is 7.92 m deep. Part A If the splash is heard 1.17 seconds later, what was the initial speed of the rock? Take the speed of sound in the air to be 343 m/s.

Which drum would make a sound that fades away faster - one that makes a loud sound or one that makes a more mellow sound Why?

Which of the following is NOT a way to increase the solubility of a solid in water? A. crushing the solid B. shaking the mixture of solid and water C. raising the temperature of the water D. letting the mixture stand still a long time