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

What tempature does stone turn to lava?

How many grams of Li3N can be formed from 1.75 moles of Li? Assume an excess of nitrogen. 6 Li (s) + N2 ( g. → 2 Li3N (s)

The definition ofacceleration

A student combine equal amounts of two solutions. One solution ha a pH of 2 and the other half had a pH of 12. Which would most likely be the resulting pH?

Renewable energy sources are best described as

Visit this website and locate the element mercury, whose chemical symbol is Hg. Click on the square to read about the history, properties, and uses of mercury. Name three uses for mercury.

Ten seconds after starting from rest, a car is moving at 40 m/s. what is the car's acceleration in meters per second per second?

A student builds a simple circuit and a magnet under one of the circuit wires. When the switch is closed charges flow int the circuit and the wire moves

Cite an example in which a force is exerted on an object without doing work on the object

Which equation best expresses the first law of thermodynamics, assuming Q is heat, U is internal energy, and W is work? A.ΔW = ΔQ + ΔU B.ΔW = ΔU - ΔQ C.ΔQ = ΔU+W D.ΔU=Q - W