#1. Consider a lake in Vermont at the end of summer. At the end of summer, you canassume the average surface water temperature is about 20 °C and the bottom of the lake isabout 10 °C. Explain in detail what happens as the cold air of winter arrives. Be sure todiscuss in detail how various heat transfer mechanisms are working.

Transfer of Heat Energy: Heat energy can be transferred from one part of space to the other part by…

Answered: #1. Consider a lake in Vermont at the…

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter1: Temperature And Heat

Section: Chapter Questions

Problem 74P: (a) How much heat transfer is required to raise the temperature of a 0.750-kg aluminum pot...

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(a) What is the rate of heat conduction through the 3.00-cm-thick fur of a large animal having a I .40-m surface area? Assume that the animal's skin temperature is 32.0 , that the air temperature is 5.00 , and that has the same thermal conductivity as air. (b) What food intake will the animal need in one day to replace this heat transfer?
On a hot day, the temperature of an 80,000L swimming pool increases by 150C. What is the net heat transfer during this healing? Ignore any complications, such as loss of water by evaporation.
(a) How much heat transfer is required to raise the temperature of a 0.750kg aluminum pot containing 2.50 kg of water from 30.0C to the boiling point and then boil away 0.750 kg of water? (b) How long does this take if the rate of heat transfer is 500 W 1watt=ljoule/second(lW=lJ/s) ?
(a) The number of kilocalories in food is determined by calorimetry techniques in which the food is burned and the amount of heat transfer is measured. How many kilocalories per gram ale there in a 5.00-g peanut if the energy from burning it is transferred to 0. 500 kg of water held in a 0.100-kg aluminum cup, causing a 54.9- temperature increase? Assume the process takes place in an ideal calorimeter, in other words a perfectly insulated container. (b) Compare your answer to the following labeling information found on a package of dry roasted peanuts: a sewing of 33 g contains 200 calories. Comment on whether the values are consistent.
(a) What is the rate of heat conduction through the 3.00-cm-thick fur of a large animal having a 1.40m2 surface area? Assume that the animal’s skin temperature is 32.0C, that tile air temperature is 5.00C, and that fur has the same thermal conductivity as air. (b) What food intake will the animal need in one day to replace this heat transfer?
(a) How much heat transfer is required to raise the temperature of a 0.750-kg aluminum pot containing 2.50 kg of water from 30.0 to the boiling point and then boil away 0.750 kg of water? (b) How long does this take if the rate of heat transfer is 500 W?
4. A copper bar lies between two heat sources given by T₁ = 100°C and Tc = 20°C. The area of the copper bar is 4.5 cm 2 and its thickness is 15 cm. Calculate the ratio of heat transfer by conduction between both sources. a. 96 J/s b. 9624 J/s c. 962 kJ/s d. 962 J/s 5. Calculate the ratio of heat flow through a window of 4.0 m² and a thickness of 3.5 mm when the indoor and outdoor temperatures are 25°C and 24°C. a. 2143 J/s b. 1143 J/s c. 11.4 J/s d. 1200 J/s 6. Six (6) molecules in a container have the following velocities: 400, 550, 345, 678, 899, 200 m/s. Find the average velocity of the gas molecules. 7. The mass of a molecule of an ideal gas is 3.56 x 10-26 kg. Calculate the speed Vrms at a temperature of 100°C. 8. The temperature of 3.00 mol of an ideal monatomic gas is increased from 30°C to 95°C. The gas is kept at constant volume. Determine the energy transferred as heat. 9. The temperature of 2.00 mol of an ideal monatomic gas is increased by 25 K at constant pressure.…
#1. What are the three mechanisms for heat transfer and how do they differ?
1. As Styrofoam box used to keep drinks cold at a picnic has a wall thickness of 9 cm. it's filled with ice, water, and cans of cola at 0°C. a) What is the total wall area of the Styrofoam box if the rate of heat flow into the box is 9.5 /s if the temperature of the outside wall is 38°C? b) How much ice melts in five hours? (Thermal conductivity of Styrofoam is 0.01 W/m k)
What are the main methods of heat transfer from the hot core of Earth to its surface? From Earth’s surface to outer space?When our bodies get too warm, they respond by sweating and increasing blood circulation to the surface to transfer thermal energy away from the core. What effect will this have on a person in a 40.0ºC hot tub?
What are the main methods of heat transfer from the hot core of Earth to its surface? From Earth’s surface to outer space? When our bodies get too warm, they respond by sweating and increasing blood circulation to the surface to transfer thermal energy away from the core. What effect will this have on a person in a 40.0ºC hot tub?
Questions... The average temperature of the ocean as a whole is just a few degrees above freezing. Given that, how is it that most of the heat in the climate system resides in the ocean?

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