When hot and cold air meet, the hot air rises to the top. Which process causes the hot air to rise?

A.

radiation

B.

conduction

C.

convection

D.

induction

Which of the following reactions release more energy? nuclear chain reactions fusion reactions fission reactions chemical reactions

Which of the following is distance divided by the change in time? displacement acceleration speed velocity

Suppose wave pulses in an aquarium are produced by a mechanical motor that moves a bob up and down at the surface. The setup uses a 10-W motor and has a period of 1.9 s between bobs. How much kinetic energy is in each pulse.

What are two ways in which Aristotle deduced that Earth is spherical?

Calculate the potential energy of a 5 kg object sitting at the top of a 2 meter ramp.

Which is a chemical change

A 20-N falling object encounters 4 N of air resistance. The magnitude of the net force on the object is?

What is the electrical power when the current is 25 amps and the voltage is 10 volts?

A cyclist rides her bike 7 mi east, and then 2 mi north before taking a break. Then she rides 5 mi east and then 3 mi north. What are the magnitude and direction of the cyclist's resultant displacement? magnitude: 13.0 mi; direction: 22.

What is the low end of the range of surface temperature of white stars