What would be an example of chemical change that took a long time to occur

To squeeze a gas into a smaller place

If a sheep is running at 3.0 m/s with a mass of 60 kg what is its kinetic energy

The speed of light is 3.00*108m/s. How long does it take for light to travel from Earth to the Moon and back again? Express your answer using two significant figures.

Clothes dryer uses about 7 amps of current from a 240 volt line. How much power does it use?

Why don't satellites in orbit fall to the ground? Why don't they fly off into space?

A father racing his son has 1/3 the kinetic energy of the son, who has 1/2 the mass of the father. The father speeds up by 1.4 m/s and then has the same kinetic energy as the son. What are the original speeds of (a) the father and (b) the son

A 2 kg book is pushed across a table is a force 4. Assuming no friction, what is the acceleration of the book?

When electricians use wiring for houses they use both copper and rubber. Which do you think is used as a conductor?

Suppose that 600 W of radiation in a microwave oven is absorbed by 250 g of water in a very lightweight cup. Approximately how long will it take to heat the water from 20 C to 80 C? (A) 50 s (B) 100 s (C) 150 s (D) 200 s

Calculate the velocity of a 1650kg satellite that is in a circular orbit of 4.2 x 10^6m above the surface of a planet which has a radius 3.95 x 10^5 m and the period of the orbit is 2.0 hours.