1. Evaporation of sweat is an important mechanism for temperature control in somewarm-blooded animals.a. What mass of water must evaporate from the skin of a 70.0-kg man to coolhis body 1.00 C°? The heat of vaporization of water at body temperature(37°C) is 2.42 X 10° J/kg·K. The specific heat of a typical human body is3480 J/kg Kb. (b) What volume of water must the man drink to replenish the evaporatedwater? Compare to the volume of a soft-drink can (355 cm).

Heat required to cooled human body 1 °C is as follows: Q=mc∆T…

Answered: 1. Evaporation of sweat is an important…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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In 1986, a gargantuan iceberg broke away from the Ross Ice Shelf in Antarctica. It was approximately a rectangle 160 km long, 40.0 km wide, and 250m thick. a. What is the mass of this iceberg, in kilograms, given that the density of ice is 917 kg/m3 b. How much heat, in joules, must be transferred to the iceberg to melt it? Assume the ice is at 0° C, and the latent heat of fusion for water is Lf=79.8 kcal/kg c. How long, in years, would it take sunlight alone to melt ice this thick, if the ice absorbs an average of 100 W/m2, 12.00 hours per day?
3. A 3.2 m length of copper pipe extends directly from a hot-water heater in a basement to a faucet on the first floor of a house. If the faucet isn't fixed in place, how much will it rise when the pipe is heated from 20.0° C to 85.9° C. The coefficient of linear expansion for copper is 1.6*10-5 K−1.
In a physics lab, students are conducting an experiment to learn about the heat capacity of different materials. The first group is instructed to add a number of 1.50 g pellets made of lead, at a temperature of 92.0°C, to 305 g of water at 16.0°C. A second group is given the same number of 1.50 g pellets as the first group, but these are now aluminum pellets. Assume that no heat is lost to or gained from the surroundings for either group. (a) If the final equilibrium temperature of the lead pellets and water is 25.0°C, how many whole pellets did the first group use in the experiment? The specific heat of lead is 0.0305 kcal/(kg · °C). pellets (b) Will the final equilibrium temperature for the second group be higher, lower, or the same as for the first group? The specific heat of aluminum is 0.215 kcal/(kg · °C). O higher O lower O the same (c) What is the equilibrium temperature of the aluminum and water mixture for the second group? °C
An insulated beaker with negligible mass contains liquid water with a mass of 0.235 kg and a temperature of 72.2 °C. ▼ Part A How much ice at a temperature of -21.4 °C must be dropped into the water so that the final temperature of the system will be 32.0 °C ? Take the specific heat of liquid water to be 4190 J/kg. K, the specific heat of ice to be 2100 J/kg. K, and the heat of fusion for water to be 3.34x105 J/kg . ► View Available Hint(s) mice = 0.096 Submit VE ΑΣΦ Provide Feedback Previous Answers www X Incorrect; Try Again; 5 attempts remaining kg Next >
parts d & e only
1. Will dumping heat into a system necessarily raise the temperature of the system? Explain. A gold pillar has a height of 3.00m when the temperature is -20.0°C. How much is the change in the height of the pillar when the temperature is +20.0°C? (See the equation 2. sheet for the properties of gold.)
A copper kettle weighs 1.03 kg. (The specific heat of copper is 0.384 J/g·°C) 1. What is the heat capacity (in J/°C) of the kettle? 2. How much heat (in J) is required to increase the temperature of this kettle from 23.1°C to 98.9°C? 3. How much heat (in J) is required to heat this kettle from 23.1°C to 98.9°C if it contains 1.30 L of water (density of 0.997 g/mL and a specific heat of 4.18 J/g·°C across the temperature range)?
2
A glass coffee pot has a 9.00 cm diameter circular bottom in contact with a heating element that keeps the coffee warm with a continuous 50.0-W heat input. (a) What is the temperature of the bottom of the pot, if it is 2.90 mm thick and the inside temperature is 67.8°C? The thermal conductivity of the pot is 0.84 J/(s · m · °C). *Answer in °C, please
9. The rod below with the cross section surface area of 0.12 m² is laterally insulated. The rod has a thermal conduction constant of 100 W/m.°C. If the temperature along the rod changes according to the function T=ax²+b, develop a model to find the heat which is transferred through the rod? 1 X=0 T=70 °C Heat flow X=2m T=30 °C X
13. Solve
1

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