During the process of the reformation of rock, what amount of pre-existing rock remains the same as its form changes?

On his way off to college, Russell drags his suitcase 19 m from the door of his house to the car at a constant speed with a horizontal force of 89 N. How much work does Russell do to on the suitcase to overcome friction? Answer to the nearest Joule.

Name three forces involved in brushing your teeth.

How is gravity important to the galaxies within our universe? two sentences

How much work must be done by frictional forces in slowing a 1000-kg car from 26.1 m/s to rest?

How does wire thickness affect the power of the electromagnet?

A taxi hurries for 1 3/4 hours with a constant speed of 84 mph and then for another 1 hour 45 minutes with a constant speed of 24 mph. what is its average speed for the total trip?

A carbon atom has how many valence electrons?

X-rays UV light waves Sound waves Earthquake waves. All of these have which characteristic in common?

V=345m/s, 7210Hz, X=?

As a mercury atom absorbs a photon of energy, an electron in the atom changes from energy level d to energy level e. Determine the energy of the absorbed photon in electronvolts.