Engineering, 13.07.2019 05:30, bks53
In a heat treatment process, a 30 mm diameter stainless steel (aisi 304) ball (ρ= 7900 kg/m3 , cp = 477 j/kg·k, k = 14.9 w/m·k) is removed from the oven at a uniform temperature of 500ºc. the ball is then subjected to a flow of air at 27ºc which provides a convection coefficient of 500 w/m2 ·k. determine: a. how long does it take for the ball to reach a minimum temperature (t) of 300ºc and the rate of heat removal (q) by each ball during this process.
Answers: 1
Engineering, 04.07.2019 03:10, lauriepdx17
What precautions should you take to prevent injuries when dealing with heavy loads?
Answers: 1
Engineering, 04.07.2019 18:10, siri5645
At 12 noon, the count in a bacteria culture was 400; at 4: 00 pm the count was 1200 let p(t) denote the bacteria cou population growth law. find: (a) an expression for the bacteria count at any time t (b) the bacteria count at 10 am. (c) the time required for the bacteria count to reach 1800.
Answers: 1
Engineering, 04.07.2019 19:10, jennymares
Abarometer contains mercury with a density of 13600 kg/m3. atmospheric conditions are 95.8 kpa and 20 °c at 20 °c, the vapor pressure of the mercury is 0.000173 kpa. the column of mercury will rise to a height of most nearly. select one: a)- 0.38 m b)- 0.82 m c)- 0.48 m d)- 0.72 m
Answers: 1
In a heat treatment process, a 30 mm diameter stainless steel (aisi 304) ball (ρ= 7900 kg/m3 , cp =...
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