which of the following drives the movement of convection currents

A. pressure differences

B. density differences

C. volume differences

Which is colder, 0 celsius or 20 fahrenheit

A rock is dropped from a sea cliff and hits the water 3.2s later. How high is the cliff? How long would it take sound to travel the same distance? How long would it take light to travel this distance? Show work!

You have an appliance that requires 1.0 amps and runs off a standard ac (120 v outlet. if you run the device for 2 hours a day for every day in a year, and electricity costs 11.

Describe how your position changes as you jump over an object

A 55.4 g sample of water at 99.61 °C is placed in a constant pressure calorimeter. Then, 23.4 g of zinc metal at 21.6 °C is added to the water and the temperature drops to 96.4 °C.

Does the size of the particles change as the substance changes state?

What is the Z number of an atom with 9 protons, 8 neutrons, and 7 electrons? 7 8 9 16 17

What is the most dense crust

V is the velocity of a particle moving along the x axis as shown. If x = 2.0 m at t = 1.0 s, what is the position of the particle at t = 6.0 s?

A compound consisting of atoms of small atomic mass is more likely to require