subject
Engineering, 27.08.2019 20:20 icantspeakengles

Afreezer compartment is covered with a 2.0-mm-thick layer of frost at the time it malfunctions. if the compartment is in ambient air at 20Âșc and a coefficient of1.8 w/m2 ·k characterizes heat transfer by natural convection from the exposed surface of the layer, estimate the time required to completely melt the frost. the frost may be assumed to have a mass density of 740 kg/m3 and a latent heat of fusion of 334 kj/kg. t= hours

ansver
Answers: 3

Another question on Engineering

question
Engineering, 04.07.2019 18:10
Which of the following refers to refers to how well the control system responds to sudden changes in the system. a)-transient regulation b)- distributed regulation c)-constant regulation d)-steady-state regulation
Answers: 1
question
Engineering, 04.07.2019 18:10
Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg.k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m.k
Answers: 2
question
Engineering, 04.07.2019 19:10
Ahelical coil spring has a mean diameter of 50 mm, a wire diameter of 5.5 mm and is wound with a pitch of 10 mm. the spring steel has an ultimate strength of 1250 mpa. find the force needed to compress the spring solid and the wire stress in this condition. state whether the spring will return to its initial length.
Answers: 1
question
Engineering, 05.07.2019 10:10
What is the correct way to measure the overall length of a boat? measure from the tip of the bow to the highest point on the gunwale. measure from the tip of the bow in a straight line to the stern of the boat. measure from the tip of the bow in a straight line to the back seat. measure from port to starboard at the boat's widest point.
Answers: 1
You know the right answer?
Afreezer compartment is covered with a 2.0-mm-thick layer of frost at the time it malfunctions. if t...
Questions
question
Mathematics, 18.09.2019 07:30
question
Health, 18.09.2019 07:30
question
Mathematics, 18.09.2019 07:30
question
Mathematics, 18.09.2019 07:30
Questions on the website: 13722367