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Minchanka [31]
3 years ago
11

A hot brass plate is having its upper surface cooled by impinging jet of air at temperature of 15°c and convection heat transfer

coefficient of 220 w/m2•k. the 10-cm thick brass plate (ρ = 8530 kg/m3, cp = 380 j/kg•k, k = 110 w/m•k, and α = 33.9×10–6 m2/s) has a uniform initial temperature of 700°c, and the bottom surface of the plate is insulated. determine the temperature at the center plane of the brass plate after 3 minutes of cooling. solve this problem using analytical one term approximation method (not the heisler charts).
Physics
1 answer:
Elodia [21]3 years ago
4 0
200 degrees because I need the points
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A man starts from rest and accelerates at 4.00 m/s2. If he covers a distance of 525 m, how long does he accelerate?
rosijanka [135]

Answer:

16.2 s

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LekaFEV [45]

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Explanation:

In order to solve this question we need to know that  speed = \frac{distance}{time}. Then we need to convert 4 minutes into seconds and cm into m. We can do that by multiplying the number of minutes by 60 (because there is 60 seconds in one minute) and dividing the number of cm by 100 (because there is 100 cm in one m). So.......

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2 years ago
Help and explain thanks
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Helen [10]

Answer:

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6 0
2 years ago
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