Ques:Warming up exercises increases the blood flow to the muscles and increases the heart rate. James spent 30 minutes exercising while Mary spent only 10 minutes exercising. Which person had the higher heart rate Mary or James?

Ans:James
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Ques:A higher-frequency wave has more energy than a lower-frequency wave with the same amplitude. A low-frequency wave will have more or less energy than a high-frequency wave?

Ans:less
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Ques:The more mass a moving object has or the faster its moving, the greater its momentum. Mona loves to see how far she can slide things. If a basketball has more mass then a baseball and Mona decides to slide both items, which will have less momentum baseball or basketball?

Ans:baseball
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Ques:Because richer nations use more fossil fuels, they also cause more air pollution and global warming than poorer nations do. Amy is from the USA, where she used lots of fossil fuels. Andy is from a poor country where there are few fossil fuels to be used. The person who's country will contribute more to air pollution is Amy's or Andy's?

Ans:
Amy's
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