The following is a graph showing the displacements and times for the winner of a horse race. What was the average speed of the horse that won the race?

A.

0.05 m/s

B.

20 m/s

C.

45 m/s

D.

285 m/s

An astronaut visiting Jupiter's satellite Europa leaves a canister of 1.20 mol of nitrogen gas (28.0 g/mol) at 50.0 ∘C on the satellite's surface. Europa has no significant atmosphere, and the acceleration due to gravity at its surface is 1.30 m/s2.

Why does the color of light cause the color of the object to change

Mechanical waves form when a source of energy causes a medium to compress. a. True b. False

When viewing a piece of art that is behind glass, one often is affected by the light that is reflected off the front of the glass (called glare), which can make it difficult to see the art clearly.

Why would elements found in the same group on the periodic table have similar reactivity's A. They have the same number of protons B. They have the same number of energy levels C. They have the same atomic mass D.

The football player running toward the goal line has A. Potential energy B. Chemical energy C. Kinetic energy D. Elastic potential energy

If the density of an object is 30 g/cm3 and its volume is 10 cm3, what is its mass in grams?

Explain how atoms are aligned in a magnet in terms of the North and South poles.

Which of the following has the largest gravitational potential energy A. a 10kg dog running down the street at 30mph B. a tightrope walker slowly crossing niagara falls C. a 0.02kg bullet moving down the barrel at 800mph D.

Why does the speed of an object change when a force acts on it?