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Chapter 1: Q11-28E (page 1)
A nylon rope used by mountaineers elongates 1.10m under the weight of a 65.0-kg climber. If the rope is 45.0 m in length and 7.0 mm in diameter, what is Young鈥檚 modulus for nylon?
6.77x108Pa
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How many nanoseconds does it take light to travel 1.00 ft in vacuum? (This result is a useful quantity to remember.)?
A Fast Pitch. The fastest measured pitched baseball left the pitcher鈥檚 hand at a speed of . If the pitcher was in contact with the ball over a distance ofand produced constant acceleration, (a) what acceleration did he give the ball, and (b) how much time did it take him to pitch it?
Question- Neptunium. In the fall of 2002, scientists at Los Alamos National Laboratory determined that the critical mass of neptunium-237 is about 60 kg. The critical mass of a fissionable material is the minimum amount that must be brought together to start a nuclear chain reaction. Neptunium-237 has a density of 19.5 g/cm3. What would be the radius of a sphere of this material that has a critical mass?
In describing the size of a large ship, one uses such expressions as 鈥渋t displaces 20,000 tons.鈥� What does this mean? Can the weight of the ship be obtained from this information?
If andare nonzero vectors, is it possible for both andto bezero? Explain.
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