A 2.44 m wide by 1.15 m high metal plate must be insulated to prevent contact burn injuries. If the heat transfer rate is 125 W and the temperature across the insulation must be reduced from 88.3°C to 40.7°C, what is the minimum thickness (in cm) of insulation required [round your final answer to two decimal places]? {kins = 0.035 W/m-K}

A 2.44 m wide by 1.15 m high metal plate must be insulated to prevent contact burn injuries. If the heat transfer rate is 125 W and the temperature across the insulation must be reduced from 88.3°C to 40.7°C, what is the minimum thickness (in cm) of insulation required [round your final answer to two decimal places]? {kins = 0.035 W/m-K}

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter2: The Kinetic Theory Of Gases

Section: Chapter Questions

Problem 56P: (a) If the partial pressure of water vapor is 8.05 torr, what is the dew point? (760 torr = I atm...

See similar textbooks

Similar questions

A warms transfers energy by conduction through its blubber at the rate of 150 W when immersed in 1.00 water. The walrus's internal core temperature is 37.0 and it has a surface area of 2.00 m2. What is the average thickness of its blubber, which has the conductivity of fatty tissues without blood?
(a) If the partial pressure of water vapor is 8.05 torr, what is the dew point? (760 torr = I atm 101, 325 Pa) (b) On a warn day when the air temperature is 35 and the dew point is 25 , what are the partial of the water in the air and the relative humidity?
A 1.82 m wide by 1.11 m high metal plate must be insulated to prevent contact burn injuries. If the heat transfer rate is 136 W and the temperature across the insulation must be reduced from 87.3°C to 40.3°C, what is the minimum thickness (in cm) of insulation required [round your final answer to two decimal places]? {kins = 0.031 W/m∙K}
units in the heat absorption from the outside air. (b) 36,000 Btu/h Answers: (a) 9.43 hp, cdmppun
Given a cylindrical Cu bar (length L = 4 m, radius, r = 2 cm). One end is kept in a heat bath at 105 °C and the other temperature at 5 °C. The surface of the bar is insulated so that there is negligible heat loss through it. thermal conductivity of copper: kcu = 385 W/m K Calculate the following up to three (3) significant figures: (1) Thermal resistance Rth of the Cu bar, Ans = (2) Conduction heat current HC, Ans = (3) Temperature gradient AT/Ax, Ans = (4) Temperature T of the Cu bar 0.5 m from the hot end, Ans in W in C/m in K/W in C
Given a cylindrical Cu bar (length L = 4 m, radius, r = 2 cm). One end is kept in a heat bath at 105 °C and the other temperature at 5 °C. The surface of the bar is insulated so that there is negligible heat loss through it. thermal conductivity of copper: kcu = 385 W/m K Calculate the following up to three (3) significant figures: (1) Thermal resistance Rth of the Cu bar, Ans = (2) Conduction heat current Hc, Ans = in W in K/W
A walrus transfers energy by conduction through its blubber at the rate of 150 W when immersed in -1.00C water. The walrus’s internal core temperature is 37.0C, and it has a surface area of 2.00m. What is the average thickness of its blubber, which has the conductivity of fatty tissues without blood?
Thermography is a technique for measuring radiant heat and detecting variations in surface temperatures that may be medically, environmentally, or militarily meaningful.(a) What is the percent increase in the rate of heat transfer by radiation from a given area at a temperature of 34.0ºC compared with that at 33.0ºC , such as on a person’s skin? (b) What is the percent increase in the rate of heat transfer by radiation from a given area at a temperature of 34.0ºC compared with that at 20.0ºC , such as for warm and cool automobile hoods?
(a) The data listed in the following table gives hourly measurements of heat flux q (W/m²) at the surface of a solar collector. As an engineer, you estimated the total heat absorbed by a 4 m collector panel during a 13-hr period as h =122.39 W. The panel has an absorption efficiency eab of 45%. If the total heat absorbed is given by h = eab q A dt where A = area and q = heat flux, find K. t 0 1 3 4 5 7 9 11 13 0.10 4.32 5.14 6.05 7.73 K 7.23 5.20 3.38 0.20
In order not to damage the resistance in the kettles, the difference between the temperature ofthe heater and the fluid should not exceed 25 oC. If the heat transfer area between the fluid andthe heater is 78.5 cm2 and the heat transfer coefficient is 400 W/m2.K, find the maximumallowable power of the heater in order to boil water?
At winter design conditions, a house is projected to lose heat at a rate of 60,000 Btu/h. The internal heat gain from people, lights, and appliances is estimated to be 6000 Btu/h. If this house is to be heated by electric resistance heaters, determine the required rated power of these heaters in kW to maintain the house at constant temperature.
An electric kitchen range has a total wall area of 1.40 m2and is insulated with a layer of fiberglass 4.00 cm thick. The insidesurface of the fiberglass has a temperature of 175°C, and its outsidesurface is at 35.0°C. The fiberglass has a thermal conductivity of0.040 W /m . K. (a) What is the heat current through the insulation,assuming it may be treated as a flat slab with an area of 1.40 m2?(b) What electric-power input to the heating element is required tomaintain this temperature?