Physics, 27.07.2021 20:50 kadinmorgan
2) A four-legged wooden bar stool made out of solid Douglas fir (the Young's modulus is 1.0×1010N/m2) has legs that are 4.0 cm in diameter. When an 80 kg man sits on the stool, how much does the length of each of the legs decrease if the are 90 cm long? (Assume, for simplicity, that the stool's legs are vertical and that each bears the same load.)
Answers: 2
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The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.
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Relative to the ground below, how many joules of potential energy does a 1000-kg boulder have at the top of a 5-m ledge?
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2) A four-legged wooden bar stool made out of solid Douglas fir (the Young's modulus is 1.0×1010N/m2...
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