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: The frames for a pair of eyeglasses have a radius of 2.06 cm at 20.0°C. Lenses with radius of 2.07…

A: Thermal expansion is the term used to describe a material's propensity to change its area, density,…

Q: While hanging out in Lab, you decide to conduct another calorimetry experiment, but this time, you…

A:

Q: How much heat would flow into an 80 cm x 40 cm x 3.0 mm glass window each hour on a day when the…

A: Area= 80cm×40cm=0.32m2Kglass=0.84w/mk∆T=39.44 - 21.11=18.3°C

Q: A wall in a house contains a single window. The window consists of a single pane of glass whose area…

A: The formula for the rate of heat transfer in terms of thermal conductivity is: The thermal…

Q: A mass of ice at -4°C is needed to cool 115 kg of vegetables in a bunker for 24 hours. The initial…

A: Given that:Initial temperature of the ice, Ti=-4°CThe initial temperature of the vegetables,…

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

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Q: A 0.250-kg aluminum bowl holding 0.800 kg of soup at 28.0°C is placed in a freezer. What is the…

A: Mass of aluminium is mal = 0.250 kg Mass of soup is mw = 0.800 kg Initial temperature of the soup is…

Q: A 2.4-cm-thick wood floor covers a 4.0m×5.5m room. The subfloor on which the flooring sits is at a…

A: The expression for the rate of heat conduction through the floor is,

Q: You have a block of m = = 100 g of an unknown substance at room temperature (T; = 25°C), and you…

A:

Q: sume a dieter drinks 2.3 kg (i.e., 2.3 L) of ice water every day. The specific heat of water is…

A:

Q: During the time when a man had flu he ran a fever 2.0°c above normal. His body temperature was 39°c…

A: Given that Change in temperature is ∆θ = 2°C Mass m = 80 kg Specific heat capacity C =4186 J/kg°c

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

A: Given data:Temperature on the ground in contact with the concrete basement wall: Temperature on  the…

Q: A perfectly insulated calorimeter has the following parts placed inside of it: 0.250 kg of water at…

A: The given values are,

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: 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: A 50 KW electric furnace measure 1.2m x 1.0m x 0.8m. When the temperature inside the furnace is 1520…

A:

Q: a) If the final equilibrium temperature of the lead pellets and water is 23°C, how many whole…

A: Principle of Calorimetry When two bodies of different temperatures are brought in thermal contact,…

Q: When excessive heat is produced within the body, it must be transferred to the skin and dispersed if…

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Q: The loss of body heat via convection is described by which statement? The body gives off waves of…

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Q: When you (m=83.9 kg) walk for 61.9 min, you burn 319.02 food Calories.  When you ingest something…

A:

Q: A 5.75-g lead bullet moving at 410 m/s penetrates a wood block and comes to rest inside the block.…

A: Mass of bullet is M = 5.75 g = 5.75×10-3 kg Initial speed of bullet is u = 410 m/s  Specific heat of…

Q: It is important for the body to have mechanisms to effectively cool itself; if not, moderate…

A: Given Data: The mass of a man is m=70 kg The time for which he runs on a treadmill is, t=30 min The…

Q: A wall in a house contains a single window. The window consists of a single pane of glass whose area…

A:

Q: student is trying to find the energy it takes to melt an ice cube. They measure exactly 95.1 mL of…

A:

Q: A 1.8-cm-thick wood floor covers a 4.0 m × 5.5 m room. The subfloor on which the flooring sits is at…

A:

Q: A wall in a house contains a single window. The window consists of a single pane of glass whose area…

A:

Q: When you (m=84.1 kg) walk for 67.1 min, you burn 458.74 food Calories.  When you ingest something…

A:

Q: Problem 9 You have 975 grams of liquid water in a 275 gram glass container. Initially, the water and…

A: mass of water = 975 g mass of glass container = 275 ginitial temperature of water and glass = 22.5 C…

Q: A 7 kg of glass bowl (c = 840 J/kg·K) contains 16 kg of water (c =4186 J/kg·K) at 25°C. 2.5 kg of…

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Q: A suspension bridge cable is exposed to the elements. For this particular bridge, temperatures vary…

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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: A plastic cup of negligible mass contains 0.280 kg of an unknown liquid at a temperature of 30.0 °C.…

A:

Q: When you (m=75.8 kg) walk for 74.6 min, you burn 503.26 food Calories.  When you ingest something…

A:

Q: You have 975 grams of liquid water in a 275 gram glass container. Initially, the water and the…

A:

Q: A metal rod has a length of 2 meters and has an initial temperature of 20°C. It is connected to a…

A: Length of rod = 2m Initial teprature of rod = 20°C Maximum change in length = 0.5% ∆L = 2×0.5100=…

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

A:

Q: A 2.80-kg steel ball at 24.7°C is dropped from a height of 15.4 m into an insulated container with…

A: mass of steel ball ms= 2.80kg temperature of steel ball is Ts= 24.7o C height of the ball h = 15.4 m…

Q: You drop an ice cube into an insulated bottle full of water and wait for the ice cube to completely…

A: Given data: Mass of ice is, m=70 g =0.07 kg. Initial temperature of ice is, T1=0∘C =273+0 =273 K.…

Q: A closed box is filled with dry ice at a temperature of -88.3 oC, while the outside temperature is…

A: The rate of heat conduction is given by

Q: To measure the heat capacity of an object, all you usually have to do is put it in thermal contact…

A: Given: The initial temperature of the water is 20° C. The mass of the water in the cup is 250 g. The…

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

A:

Q: 2 A Thermopane window of area 5 m² is con- structed of two layers of glass, each 4.4 mm thick…

A:

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.