Can fly but have no wings. I can cry but I have no eyes. Wherever I go, darkness follows me. What am I?

Suppose a cart is being moved by a certain net force. If the net force is increased by a factor of 6.8, by what factor does its acceleration change?

What element is the basis for all living things and can combine with other elements in many ways?

Mike has a mass of 97 kg. He jumps out of a perfectly good airplane that is 2000 m above the ground. After he falls 1000 m, when his downward speed is 68 m/s, Mike opens his parachute. The positive y-direction is downward.

Which is about 30 times as far from the sun as our own planet?

Which of the following is defined as displacement over change in time? A. Speed B. Acceleration C. Velocity D. Displacement

If a tennis ball has a velocity of 18 m/s and a momentum of 1.06 kg • m/s, what is the mass of the tennis ball in grams?

Why does it rain so hard?

Three liquids are at temperatures of 5 ◦C, 25◦C, and 34◦C, respectively. Equal masses of the first two liquids are mixed, and the equilibrium temperature is 17◦C.

The air you breathe is an example of a (n) ?

How do fluids move? Explain.