In a heat-treating process, a 1-kg metal part, initially at 1075 k, is quenched in a tank containing 100 kg of water, initially at 295 k. there is negligible heat transfer between the contents of the tank and their surroundings. the metal part and water can be modeled as incompressible with specific heats 0.5 kj/kg-k and 4.2 kj/kg-k, respectively. determine (a) the final equilibrium temperature after quenching, in k, and (b) the amount of entropy produced within the tank, in kj/k
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Physics, 22.06.2019 10:10, natalieagustinlop54
Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.
Answers: 2
Physics, 22.06.2019 19:40, mickellife4659
22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?
Answers: 1
In a heat-treating process, a 1-kg metal part, initially at 1075 k, is quenched in a tank containing...
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