subject
Engineering, 10.11.2019 04:31 SerenaPlamberry

An electronic device dissipating 25 w has a mass of 20 g and a specific heat of 850 j/kg·0k. the device is lightly used, and it is on for 5 min and then off for several hours, during which it cools to the ambient temperature of 250c. let the mass of heat sink vary from 0 to 1 kg. plot the maximum temperature against the mass of heat sink, and discuss the results. u

ansver
Answers: 2

Another question on Engineering

question
Engineering, 03.07.2019 15:10
Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.
Answers: 1
question
Engineering, 04.07.2019 18:20
For a gate width of 2 m into the paper, determine the force required to hold the gate abc at its location.
Answers: 1
question
Engineering, 04.07.2019 19:20
Liquid flows at steady state at a rate of 2 lb/'s through a pump, which operates to raise the elevation of the liquid 100 ft from control volume inlet to exit. the liquid specific enthalpy at the inlet is 40.09 btu/lb and at the exit is 40.94 btub. the pump requires 3 btu/s of power to operate. if kinetic energy effects are negligible and gravitational acceleration is 32.174 tt/s, the heat transfer rate associated with this steady state process is most closely 1)-2,02 btu/s from the liquid to the surroundings 2)-3.98 btu/s from the surroundings to the liquid. 3)-4.96 btu/s from the surroundings to the liquid. 4)-1.04 btu/s from the liquid to the surroundings.
Answers: 2
question
Engineering, 04.07.2019 19:20
Acircular pipe of 30mm outside diameter is placed in an airstream at 30 c and latm pressure. the air moves in cross flow over the pipe at 20 m/s, while the outer surface of the pipe is maintained at 110 c. what is the drag force exerted on the pipe per unit length? what is the rate of heat transfer from the pipe per unit length?
Answers: 1
You know the right answer?
An electronic device dissipating 25 w has a mass of 20 g and a specific heat of 850 j/kg·0k. the dev...
Questions
question
Physics, 09.07.2019 01:00
question
Mathematics, 09.07.2019 01:00
question
Mathematics, 09.07.2019 01:00
Questions on the website: 13722363