Physics, 13.07.2019 04:30, anonymous777739
Heat flows through a certain wall at a rate of h, when the temperatures on either side of the wall are tc and th the dimensions of the wall are a and b. you want to add a layer of insulation to the wall to reduce the rate of heat flow by percentage p. the insulating material is to have thermal conductivity k and thickness w. (a) draw two pictures: one of the original wall, and one with the layer of insulation added label all relevant information (b) derive an expression for w in terms of ht tc th a b p and . (c) calculate a value for wif k 0.0800 w/m-k a 3.00 m b 5.00 m tc 20.0 °c th-32.0 °c h1 1500 w p-90.0%
Answers: 1
Physics, 21.06.2019 23:30, kennydenny4897
Ais not a compound machine. a. bolt b. shovel c. handcart (dolly) d. see-saw (teeter totter)
Answers: 2
Physics, 22.06.2019 01:00, jayycruz59
An object is 10. cm from the mirror, its height is 3.0 cm, and the focal length is 2.0 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1.33 -1.33 +0.75 -0.75
Answers: 2
Heat flows through a certain wall at a rate of h, when the temperatures on either side of the wall a...
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