If an athlete weighs 133 lb and has 15.0 % body fat by weight, how many pounds of fat does the athlete's body contain?

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?