Calculate the convection heat loss per hour for a nude standing in a 5 m/sec wind. Assume Ts 33C, Ta-10C, and Ac-1.2m ?

Q: A styrofoam cooler has a thickness of 1.10 cm and a total surface area of 2.20 m². If the outside…

A: Given data: Thickness of the cooler, d=1.10 cm =1.10×10-2 m Surface area of the cooler, A=2.20 m2…

Q: What is the virtual temperature for a kilogram of air at T = 283 K, relative humidity 50% at 1000…

A: The air temperature is T=283 K. The relative humidity is RH=50%. The pressure is p=1000 hpa.

Q: If the average normal temperature decreases with altitude in the troposphere is 6.5 °C/km, calculate…

A: Temperature decreases in troposphere with the increasing height. The rate of decrease of temperature…

Q: The upper surface of a 50-cm-thick solid plate (k = 237 W/m·K) is being cooled by water with…

A: The heat flux through the plate by conduction can be obtained as

Q: Two bodies of different temperature T1 and T2 if brought in thermal contact , do not necessarily…

A: When two bodies of different temperatures T1 and T2 are brought in thermal contact , there is flow…

Q: What increase in altitude is necessary in the stratosphere to halve the pressure? Assume a constant…

A: The ratio of the pressures (P2/P1) and densities (ρ2/ρ1) for altitudes h2 and h1 in an isothermal…

Q: By what percent will the radiated heat per square meter increase due to such a temperature…

A: We know that radiated head energy per unit area = eσT4 Where ,e is emmisivity and σ is Stefan…

Q: The Earth is not in thermal equilibrium with sun, Why?

A: The temperature of the sun and that of earth aren’t the same. Sun is at a very high temperature and…

Q: a thin, square steel plate, 20 cm on a side, is heated on blacksmith forge to 800 degree celcius. if…

A: Side of square plate = 20 cm Final temperature = 800oC = 800+273= 1073 Kemissivity (e) = 0.30 time…

Q: in a living room a person has a temperature of 35C .If the room. temperature is 30C what is the body…

A:

Q: What amount of heat must be supplied to 2.0 × 10-2 kg of nitrogen (at roomtemperature) to raise its…

A: The expression for amount of heat is,

Q: A window glass 0.50-cm thick has dimensions of 3.0 m by 1.5 m. If the outside temperature is -10°C…

A:

Q: A patient with pneumonia has a temperature of 42.2 oC. What does this read on a Kelvin thermometer?

A: Given Temperature of the patient (TC) = 42.2 oC

Q: Calculate the mass of water vapour present in a room of volume 250 m3 that contains air at 23 °C on…

A: Understand that at 23 oC the equilibrium water vapour pressure is 0.0277 atm. Further, the relative…

Q: The Sun has a radius of about 700,000 km and a surface temperature of 5800 K. Assuming it is a…

A:

Q: Can a medium involve (a) conduction and convection,(b) conduction and radiation, or (c) convection…

A:

Q: A 6-m-long section of an 8-cm-diameter horizontal hot-water pipe passes through a large room whose…

A: Given: A 6-m-long section of an 8-cm-diameter horizontal hot-water pipe passes through a large room…

Q: What is the average energy contained in a 1.00 m3volume near the Earth’s surface due to radiant…

A: The expression for energy density stored in electric field as, u=12ε0E02 The equation for the…

Q: if the temperature gradient is 4C per 100km and the specific heat capacity of the air is 0.2K…

A: We have air that moves with a velocity v=14 km/hr across a point P for t=14 hr with a temperature…

Q: A window glass 0.50-cm thick has dimensions of 3.0 m by 1.5 m. If the outside temperature is 40°C…

A: Given: The thickness (t) of the window is 0.50 cm. The dimensions of the window are 3 m by 1.5 m.…

Q: Why do you feel uncomfortably warm on a hot and humid day?

A: We feel uncomfortably warm on a humid day because as the humidity increases the rate of evaporation…

Q: If 1.5 m^3 of an ideal gas initially at STP is compressed to 0.75 m^3 and heated to 30 degrees…

A: Given: Initial volume, V1=1.5 m3  at STP Final temperature, T2 = 30 ℃ V2 = 0.75 m3   To determine…

Q: Calculate the rate of heat conduction out of the human body, assuming that the core internal…

A:

Q: Can we define the convection resistance for a unit surface area as the inverse of the convection…

A: To define: Convection resistance for a unit surface area as the inverse of the convection heat…

Q: Why are cloudy nights generally warmer than clear ones?

A: Cloud is defined as dense texture of moisture molecules present in the atmosphere.

Q: What was the precise temperature at the bottom of Lake Superior at 12:01 am on October 31, 2000?

A:

Q: How much heat is conducted through a sheet of plate glass, k=0.0024 cal/cm2-sec-°C/cm, which is 2.0…

A: We have to find that much heat is conducted through a sheet of plate glass, k=0.0024…

Q: Calculate its total power radiated at this temperature 300K. C. 459.3W/m2 A. 10.3W/m2 B. 321.7W/m2…

A: Given, Temperature=300k

Q: The amount of radiant power produced by the sun is approximately 3.9 × 1026 W. Assuming the sun to…

A:

Q: If I were in space, how long would it take to get hypothermia ( ΔT = -2 °C). Assume I am essentially…

A: According to Stefan’s law,

Q: Soon after Earth was formed, heat released by the decay of radioactive elements raised the average…

A: The expression for volumetric expansion due to thermal expansion is,

Q: In one day, the temperatures of a desert range from 110°F in the afternoon to 55°F at night. What is…

A: Given in question - Desert temperature range in Fahrenheit -  ( 110°F to 55°F) To find - What is…

Q: A limited amount of water in a container is subjected to 5 W/m2K convection condition as the sky…

A: Given: convection condition =  5 W/m2K T1 = -40 °C α = ε= 0.96. T2 = 0°C.

Q: Calculate the rate of heat conduction out of the human body, assuming that the core internal…

A: Given Internal temperature is t1=38.1°C Skin temperature is t2=30.71°C Thickness of the skin is…

Q: After sunset, radiant energy can be sensed by a person standing near a brick wall. Such walls…

A: In this question we are given that after sunset, radiant energy can be sensed by a person standing…

Q: If an incandescent light bulb has a luminosity L= 60W and a filament temperature of T= 2900K, what…

A:

Q: You are traveling to London in October and you found out that temperature at that time of the year…

A:

Q: A 22°C day is warm, while a swimming pool at 22°C feelscool. Why?

A: A 22°C day is warm, while a swimming pool at 22°C feels cool

Q: Explain why it is possible to see frost on the ground or on the tops of parked automobiles even…

A: Frost is a layer of ice that forms on surfaces that are at 32°F or below of it.

Q: 1. A 5.2 cm diameter spherical ball whose surface is maintained at a temperature of 71°C is…

A: Assumptions 1 Steady operating conditions exist since the ball surface and the surrounding air and…