A 20.0 kg rectangular block of material has a surface area of 2.20 m²and thickness of 30.0 cm. The material has a specific heat capacity of 750 J/kg°Cand coefficient of volume expansion of 6.4 x 10-5/°C respectively.a) How much heat must be added to the block in order to increase its volume by1.2 x 10-5m³?b) If it takes 2.0 h for energy transfer from the end at high temperature to the endat low temperature, determine the rate of energy transfer.c) Determine the thermal conductivity of the rectangular box.

The new volume of an object that has expanded due to a temperature rise is given by V = Vo1+β∆T,…

A 20.0 kg rectangular block of material has a surface area of 2.20 m² fand thickness of 30.0 cm. The material has a specific heat capacity of 750 J/kg°C and coefficient of volume expansion of 6.4 x 10-5/°C respectively. a) How much heat must be added to the block in erder to increase its volume by 1.2 x 10-5m³? b) If it takes 2.0 h for energy transfer from the end at high temperature to the end at low temperature, determine the rate of energy transfer. c) Determine the thermal conductivity of the rectangular box.

A 20.0 kg rectangular block of material has a surface area of 2.20 m² fand thickness of 30.0 cm. The material has a specific heat capacity of 750 J/kg°C and coefficient of volume expansion of 6.4 x 10-5/°C respectively. a) How much heat must be added to the block in erder to increase its volume by 1.2 x 10-5m³? b) If it takes 2.0 h for energy transfer from the end at high temperature to the end at low temperature, determine the rate of energy transfer. c) Determine the thermal conductivity of the rectangular box.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter1: Temperature And Heat

Section: Chapter Questions

Problem 119AP: For the human body, what is the rate of heat transfer by conduction through the body's tissue with...

See similar textbooks

Similar questions

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 250 m thick. (a) What is the mass of this iceberg, given that the density of ice is 917kg/m3 ? (b) How much heat transfer (in joules) is needed to melt it? (c) How many years would it take sunlight alone to melt ice this thick, if the ice absorbs an average of 100W/m2, 12.00 h per day?
(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.
For the human body, what is the rate of heat transfer by conduction through the body's tissue with the following conditions: the tissue thickness is 3.00 cm, the difference in temperature is 2.00 , and the skin area is 1.50 m2. How does this compare with the average heat transfer rate to the body resulting from an energy intake of about 2400 kcal per day? (No exercise is included.)
A picture window has dimensions of 1.34 m by 2.65 m and is made of glass 5.93 mm thick. On a winter day, the outside temperature is -20°C, while the inside temperature is a comfortable 19.5°C. At what rate is heat being lost through the window by conduction? kglass = 0.80 W/m.K Round your answer to 2 decimal places.
a) Some water has frozen in a gutter. The gutter is a cylinder that has a 3 inch diameter and is 8 feet long. If this volume of ice starts to melt, how much heat energy, in Joules, does it take to raise the temperature of the ice from −7 ◦C to 0◦C? The density of ice is 916.9kg/m3 b) Now that the ice is at 0◦C, how much heat does it take to melt all of the ice into liquid water at 0◦C? Answer: 3.4 × 106J c) Finally, how much heat does it take to raise the temperature of the liquid water by 7 more degrees C? Assume the specific heat of water is 4186 J/kg◦C.
A refrigerator door is opened and room-temperature air (20°C) fills the 1.50 m 3 compartment. A 10.0 kgm turkey, also at room temperature, is placed in the refrigerator and the door is closed. The density of air is 1.20 kgm/m3 and its specific heat is 1020 J / kgm °C. Assume the specific heat of a turkey, like that of a human, is 3480 J / kgm °C. How much heat must the refrigerator remove from its compartment to bring the air and the turkey to thermal equilibrium at a temperature of 5°C? Assume no heat exchange with the surrounding environment.
a) Some water has frozen in a gutter. The gutter is a cylinder that has a 3 inch diameter and is 8 feet long. If this volume of ice starts to melt, how much heat energy, in Joules, does it take to raise the temperature of the ice from −7 ◦C to 0◦C? The density of ice is 916.9kg/m3 b) Now that the ice is at 0◦C, how much heat does it take to melt all of the ice into liquid water at 0◦C? c) Finally, how much heat does it take to raise the temperature of the liquid water by 7 more degrees C? Assume the specific heat of water is 4186 J/kg◦C.
A). How much heat transfer (in kcal) is required to raise the temperature of a 0.550 kg aluminum pot containing 2.00 kg of water from 20.0°Cto the boiling point and then boil away 0.700 kg of water? B). How long (in s) does this take if the rate of heat transfer is 600 W (1 watt = 1 joule/second (1 W = 1 J/s))?
A glass window is 3.7 mm thick, is 2.29 m tall by 1.04 m wide, and has a thermal conductivity of 1.0 W/m K. What is the rate of heat loss (in W) through the window if the inside temperature is 22.3° C and the outside temperature is -20.7 ° C ?
Suppose you stand with one foot on ceramic (k=34 W/mK) flooring and one foot on a wool carpet (k =0.026 W/mK), making contact over an area of 77.5cm2 with each foot. Both the ceramic and the carpet are 3.4 cm thick and are 8°C on their bottom sides. If the top of the ceramic and carpet at 25°C, calculate the following. a) the rate of heat transfer that occur from the foot kept on wool carpet in watts b) the rate of heat transfer that occur from the foot kept on ceramic in watts
7. (a) What is the heat capacity of a system consisting of a 0.3600 kg brass cup filled with 0.05000 kg of water? in kJ/K (b) What is the heat capacity of a system consisting of 7.700 kg of water in a 0.8800 kg aluminum bucket? in kJ/k
(a) What is the rate of heat conduction through the 3.00-cm-thick fur of a large animal having a 1.40-m2 surface area? Assume that the animal’s skin temperature is 32.0ºC , that the air temperature is −5.00ºC , and that furhas the same thermal conductivity as air. (b) What food intake will the animal need in one day to replace this heat transfer?