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Chapter 1: Q28 E (page 1)
A nylon rope used by mountaineers elongates 1.10 m 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?
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How many years older will you be 1.00 gigasecond from now? (Assume a 365-day year.)
In Wagner鈥檚 opera Das Rheingold,the goddess Freia is ransomed for a pile of gold just tall enough and wide enough to hide her from sight. Estimate the monetary value of this pile. The density of gold is 19.3 g/cm3, and take its value to be about $10 per gram.
Given two vectors and , (a) find the magnitude of each vector; (b) use unit vectors to write an expression for the vector difference ; and (c) find the magnitude and direction of the vector difference . (d) In a vector diagram show and , and show that your diagram agrees qualitatively with your answer to part (c).
A juggler throws a bowling pin straight up with an initialspeed of 8.20 m/s. How much time elapses until the bowling pinreturns to the juggler鈥檚 hand?
Starting from the front door of a ranch house, you walk 60.0 m due east to a windmill, turn around, and then slowly walk 40.0 m west to a bench, where you sit and watch the sunrise. It takes you 28.0 s to walk from the house to the windmill and then 36.0 s to walk from the windmill to the bench. For the entire trip from the front door to the bench, what are your (a) average velocity and (b) average speed?
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