A 5000 kg African elephant has a resting metabolic rate of 2500 W. On a hot day, the elephant’s environment is likely to be nearly the same temperature as the animal itself, so cooling by radiation is not effective. The only plausible way to keep cool is by evaporation, and elephants spray water on their body to accomplish this. If this is the only possible means of cooling, how many kilograms of water per hour must be evaporated from an elephant’s skin to keep it at a constant temperature?

Q: Thermal energy is being transferred through a 0.8 mm layer of human skin at a rate of 1.1 x 104…

A: Heat is just energy in transit. When it is not moving it is thermal energy. It is that heat flows…

Q: Homes are often insulated with fiberglass insulation in their walls and ceiling. The thermal…

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Q: A metal rod is 10 cm long and has a diameter of 2 cm one end is in contact with steam at 100 deg C…

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Q: Consider a person standing in a room at 20°C with an exposed surface area of 1.7 m2. The deep body…

A: Solution:-         Room temperature T∞=20°C          Surface area As=1.7 m2…

Q: Overall, 80% of the energy used by the body must be eliminated as excess thermal energy and needs to…

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Q: A child running a temperature of 101°F is given an antipyrin (i.e. medicine that lowers fever) which…

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Q: The average thermal conductivity of the walls (including windows) and roof of a house in the figure…

A: The area of the side walls can be written as A1=2ls·hA1=210.0 m5.00 mA1=100 m2…

Q: In an electrically heated home, the temperature of the ground in contact with a concrete basement…

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Q: A closed box is filled with dry ice at a temperature of -80.9 oC, while the outside temperature is…

A: Given values: Temperature of dry ice, T1=-80.9 °C Outside temperature, T2=28.4 °C Side of the cube,…

Q: The average thermal conductivity of the walls (including windows) and roof of a house in the figure…

A: According to given, Total area is given by, A= Area of end walls + Area of ends of attic + Area of…

Q: The average thermal conductivity of the walls (including windows) and roof of a house in the figure…

A: The formulas used to solve the problem are listed below. The volume of gas that must be burned will…

Q: A uniform steel plate has an area of 0.839 m². When subjected to a temperature difference between…

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Q: In a cold country, the temperature on the surface of a lake has dropped to a temperature T1 = -10°C…

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Q: Many species cool themselves by sweating, because as the sweat evaporates, heat is transferred to…

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Q: In an electrically heated home, the temperature of the ground in contact with a concrete basement…

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Q: Alligators and other reptiles don’t use enough metabolic energy to keep their body temperatures…

A: The energy required to raise the temperature of the alligator can be obtained as

Q: (a) At what rate is his excess thermal energy dissipated by radiation? (Enter your answer to at…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: The average thermal conductivity of the walls (including windows) and roof of a house in the figure…

A: Given: The thermal conductivity of walls is k=4.8×10-4 kW/m·∘C. The thickness of the walls is…

Q: While swimming, conduction can play a big role in heat loss from the body. The body of one swimmer…

A: Given data: Thickness thickness (b) = 1.6 mm Thermal conductivity of the skin (k)=0.37 W/m.K Water…

Q: A styrofoam container used as a picnic cooler contains a block of ice at 0°C. If 564 g of ice melts…

A: Given data:  Mass of ice (m) = 564 g = 0.564 kg Time (t) = 1 hour = 3600 seconds The heat of fusion…

Q: Problem 4. (a) How much heat transfer is necessary to raise the temperature of 0.800kg of water from…

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Q: Overall, 80% of the energy used by the body must be eliminated as excess thermal energy and needs to…

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Q: A solid concrete wall has dimensions 4.0 m × 2.4 m and is 30 cm thick. The thermal conductivity of…

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Q: A container holds 820 kg of ice at a temperature of -24°C. It is heated at a rate of 16 kW for a…

A: The container holds ice of mice = 820 kg at a temperature of Ti=-24°C. It is heated at a rate of P =…

Q: Homes are often insulated with fiberglass insulation in their walls and ceiling. The thermal…

A: Given: The thermal conductivity is 0.040 W/m.K. The surface area is 370 m2. The insulation is 10 cm.…

Human Metabolism

Being described as the most complicated machine ever encountered by humans, the human body and the cell metabolism is nothing less than a wonder. Metabolism is the set of life-sustaining chemical reactions within organisms.