A swift karate chop with one's bare hand breaks a cement block. The amount of force by the block on one's hand is
A. zero.
B. the same as the force applied to the block.
C. less than the force applied to the cement block.
D. more than the force applied to the block.
Answer: B
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a. true b. false
Which of the following is densest: a kilogram of feathers, a kilogram of bricks, or a kilogram of water?
A) A kilogram of feathers B) A kilogram of water C) A kilogram of bricks D) All three have the same density because they all have the same mass.
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Individual efforts to reduce the volume of the waste stream
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