A person rubs her hands together and they heat up

• kinetic energy

• light energy

• sound energy

• electrical energy

• chemical energy

• heat energy

(multiple choice)

How far apart are the stop signs

Do all rocks stay the same throughout their life time

Which describes the relationship between the frequency, wavelength, and speed of a wave as the wave travels through different media? A). As speed changes, wavelength changes and frequency remains constant. B).

The tonga trench in the pacific ocean is 36,000 feet deep. assuming that sea water has an average density of 1.04 g/cm3, calculate the absolute (total) pressure at the bottom of the trench in atmospheres. (1.00 in = 2.54 cm, 1.00 atm = 1.

How many different values of ml are possible in the 5d sublevel?

Tarzan runs at 6 m/s and grabs a vertical vine (negligible mass) 4.1 m long which is tied to a tree at the top. Tarzan swings up. Determine the maximum height Tarzan will swing up and the angle the vine makes respect to vertical.

What is the safest place to be amid the coronavirus?

What is the change in internal energy if 60 J of heat are added to a system and the system does 40 J of work on its surroundings? Use AU = Q-W.

A 35-N bucket of water is lifted vertically 3.0 m and then returned to its original position. How much work did gravity do on the bucket during this process?

You then decide to throw another disc to your friend in the tree for fun. If you throw the disc at a speed of 10 m/s and your friend catches it 5.0 m above you, what was the speed of the disc just before your friend catches it