A. s.a.! 30 points

which of these would be the best definition of energy?

a) the ability to do work

b) the development of a future source of fuel

c) the feeling one gets from drinking caffeine

d) the feeling one feels after riding a roller coaster

Only 3% of the water on earth is usable by humans. even though that 3% is through the water cycle, we still need to be careful not to waste water.

1. study the scenario. the particles in some system are moving around quickly. a few minutes later, the particles are moving, on average, more slowly. how does this change in motion affect the temperature of the system? the temperature of the system did not change. the speed of the particles does not affect temperature, the number of particles affects the temperature. the temperature of the system is lower now than it was initially. faster moving particles result in a higher temperature for the system. the temperature of the system is higher now than it was initially. slower moving particles result in a higher temperature for the system. the temperature of the system did not change. the speed of the particles has no effect on the temperature, only the type of atom affects the temperature.

Acar's position in relation to time is plotted on the graph. what is the car's average velocity for segment c? a) -4 m/s b) -0.25 m/s c) 0.25 m/s d) 4 m/s