A man consumes 2850 kcal of food in one day, converting most of it to maintain his body temperature. If he loses half this energy by evaporating water (through breathing and sweating), how many kilograms of water evaporate? The latent heat of vaporization of water is Lv = 580 kcal/kg.

Q: A 0.593 g sample of steam at 105.9 °C is condensed into a container with 5.52 g of water at 14.6 °C.…

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Q: hat is the rate of heat flow through a pane of glass that is 25.0 cm by 100.0 cm with a thickness of…

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Q: 4. A woman finds the front windshield of her car covered with ice at -12°C. The ice has a thickness…

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Q: How many grams of coffee must evaporate from 600 g of coffee in a 190 g glass cup to cool the coffee…

A: This is a question from the calorimetry from thermodynamics, according to the rule of calorimetry…

Q: The core temperature of an athlete is 37 °C and his surface area is 1.8 m2. The thermal conductivity…

A: Concept: The Formula to determine the rate of Heat Flow is, Qt=kA∆Txwhere,k=Coefficient of Thermal…

Q: ce at 0.0°C is mixed with 8.30 × 102 mL of water at 25.0°C. How much ice must melt to lower the…

A: Solution: given that ice temperature Tice,i=0 degree C The volume of water V=8.33x102 mL water…

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

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Q: A pot 25 cm in diameter is placed on the stove. The pot is made of stainless plate (k = 15 W / [m °…

A: Given data: Diameter, d=25 cm=0.25 m Conductivity, k=15 W/m0C Thickness, ∆x=0.6 cm=0.006 m Inside…

Q: What is the specific heat capacity of the alcohol?

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Q: A 10 cm thick and 1 m wide long steel plate is immersed in an oil bath at T0 = 40 ° C when the…

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Q: During an accident, (5.70x10^0) g of boiling water at 100.0°C was splashed onto a burn victim's skin…

A: mass of boiling water = 5.7 g initial temperature of water = 100oC final temperature of water =…

Q: A styrofoam cooler has a total surface area of 1.3 square meters and a thickness of 2.2 centimeters.…

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Q: A student, who is trying to drink away memories of a physical science homework, decides to pour…

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Q: Exactly 46.33 kJ of heat is transferred to a 1.389 kg slab of nickel at a temperature of 12.7°C. (a)…

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Q: A 0.650 kg piece of glass is submerged in 820 g of water (c = 4.18 x 103 J/kg°C) at 24°C.  The…

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Q: common temperature with the pan.  What would be the final temperature, in degrees Celsius, of the…

A: According to Principle of calorimetry  Heat given by hot substance = heat taken by cold substance

Q: A dietician develops a new diet, in which people drink copious amounts of ice water. The theory is…

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Q: An apartment has a living room whose dimensions are 2.8 m x 5.2 m x 6.7 m. Assume that the air in…

A: By, ideal gas equation  PV = nRT  1.01×105×2.8×5.2×6.7 = n×8.3×(273+21)  n = 4037.68 moles

Q: Suppose you want to raise the temperature of a 0.21-kg piece of ice from -20.0degrees Celsius to…

A: Given data, Mass =m=0.21 kg Latent heat of fusion Lf=334 kJ/kg Latent heat of vaporization Lv=2256…

Q: On a hot dry day, evaporation from a lake has just enough heat transfer to balance the 1.00 kW/m2 of…

A: The rate of heat coming from the Sun isThe time of evaporation of the lake water is The latent heat…

Q: One way to keep the contents of a garage from becoming too cold on a night when a severe subfreezing…

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Q: A glass container with an insulating cover with a surface area of ( R +150)cm2 and (R+10)mm thick is…

A: Given Data, Surface Area A=233cm2thickness t=93mminitial temperature T0=00CFinal temperature T=1630C

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

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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 container holds 0.70 g of argon at a pressure of 7.5 atm. A) How much heat is required to…

A: SOlution: given that m = 0.7 g P = 7.5 atm

Q: You mix mI = 1.2 kg of ice at TI = -19°C with mW = 3.4 kg of water at TW = 86°C in an insulated…

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Q: emperature change. -First, the ice reaches 0°C. Then it starts melting while the warmer water

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Q: oom whose dimensions are 2.5 m x 5.3 m x 4.3 m. Assume that the air in the room is composed of 79%…

A: Given:- An apartment has a living room whose dimensions are 2.5 m x 5.3 m x 4.3 m.   Assume that the…

Q: The glass of a window has an area of 1.0 m² and is 0.5 cm thick. If the indoor temperature is 20°C…

A: Given data: Area of glass window A=1.0 m2. Thickness of glass window t=0.5 cm. Indoor temperature…

Q: A sealed container holding 0.492 kg of liquid nitrogen at its boiling point of 77.3 K is placed in a…

A: Heat energy is how quickly the molecules and particles in a substance are moving. Temperature is the…

Q: Researchers are conducting a study to quantity the thermal conductivity of a composite material. A…

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Q: The fruit juice is heated in a heat exchanger using steam as a heating medium. The product flows…

A: Latent heat of steam is 2256.4KJ/kg.

Q: When you (m=57.9 kg) walk for 77 min, you burn 537.59 food Calories.  When you ingest something…

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

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Q: The specific heats of aluminum and iron are 0.214 and 0.107 calories per gram degrees Celsius​…

A: Given data, Specific heat of the iron Ciron=0.107 cal/g°C Specific heat of the aluminum CAl=0.214…

Q: assume that for any movement, 10.0% of energy used by human muscles goes into performing the…

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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…