Which activity is an example of a chemical change?

a. sugar dissolving in water

b. water evaporating into water wapor

c. lighting a match

d. freezing water

What basic form of energy is present in blowing wind?

How many atoms of nitrogen are in chemical formula Ni (NO3) 2

Real gases are those that: A. only behave ideally at high pressures or low temperatures B. have an even number of protons C. are only available naturally in the earth's atmosphere D. deviate from ideal behavior E.

Why do astronomers think that the milky way is a spiral galaxy?

You replace a 100 W incandescent lightbulb with a 22 W CFL bulb. If you leave your lights on 24 hours a day, how much energy are you saving each day by replacing this bulb?

2. What was the role of women as industry increased? A. They gained the vote, B. They became industry leaders, e. They led the household D. They can for government office,

A 26-g steel-jacketed bullet is fired with a velocity of 630 m/s toward a steel plate and ricochets along path CD with a velocity 500 m/s.

A small boat is carrying four people across a river. Without any paddling, the boat moves downstream at a steady speed of 5 m/s. If the average weight of the four people is 60 kg, then what is the speed of the boat after one person gets?

Does temperature affect the dissolving phase?

In a clear, coherent, paragraph-length answer, explain why the speed of the apple half way between the release and the maximum height is not half the initial speed.