What is the mass of an object weighing 63N on earth

Which of these would be the best definition of energy? A) the ability to do work B) the development of a future source of fuel C) the feeling one gets from drinking caffeine D) the feeling one feels after riding a roller coaster

A stretched spring has an elastic potential energy of 35 J when it is stretched 0.54 m. What is the spring constant of the spring? Round your answer to two significant figures.

How do we calculate changes in velocity using the Law of Conservation of Momentum?

What is a high speed electron with a negative charge called?

A stretched string of length L is observed to vibrate in seven equal segments when driven by a 686-Hz oscillator. What oscillator frequency will set up a standing wave so that the string vibrates in two segments?

The force of gravity on a person or object on the surface of a planet is called?

What happens to the particles of the liquid inside a thermometer when the thermometer is heated? They slow down and spread apart. They speed up and spread apart. They slow down and move closer together. They speed up and move closer together.

You did 150 joules of work lifting a 120 - N backpack. how high did you lift the backpack? how much did the backpack weigh in pounds

After the layers of sediment are deposited in one place, they are

A rectangular gasoline tank can hold 50.0 kg of gasoline when full. What is the depth of the tank if it is 0.500-m wide by 0.900-m long, given that the density of gasoline is 6.8 x 102 kg/m3