Two engineering students learned about petroleum products, While Dan learned more about plastics, Jim learned about fuels. Which student learned less about fuels for trains?
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Answer: Dan

John was studying the species in Siberia. He found that the Siberian tiger is an apex predator. It had a pretty stable population during the sixteenth century. He noted that information as case A. Then with the introduction of guns the number of Siberian tigers decreased in the seventeenth century. He noted that information as case B. In case B, would the number of mesopredators be less or more than in case A?
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Answer: more

Martin is moving and he needs to make a ramp so he can load heavy furniture into his truck. He has a bad back, so he wants to use the least effort possible. Before he cuts the wood, he is trying to decide how long the ramp should be so he can move the heavy furniture easily. If Martin builds a ramp with a very gentle slope will he need to exert more or less effort?
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Answer:
less