A solar collector is placed in direct sunlight where it absorbs energy at the rate of 900 J/s for each square meter of its surface. The emissivity of the solar collector is e = 0.74. What equilibrium temperature does the

A solar collector is placed in direct sunlight where it absorbs energy at the rate of 900 J/s for each square meter of its surface. The emissivity of the solar collector is e = 0.74. What equilibrium temperature does the

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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A 0.422 g food sample is used to raise the temperature of 14.656 g of water by 45.2 celsius. How many food Calories (kilocalories) of energy does the food contain per gram?
A block of iron (c=448.00 J/kj°C) initially at temperature 6.00°C is dropped into an insulated container filled with 15.71kg of water ( cwater=4186.00 J/kg°C) at 93.00°C. They come to equilibrium at a final temperature of 39.00°C. Determine the mass of the iron block. _____kg Determine the magnitude of thermal energy Q transferred between the two substances. ______kJ
The surface of the Sun has a temperature of about 5,800 K. The radius of the Sun is 6.96 108 m. Calculate the total energy radiated by the Sun each second. Assume that the emissivity of the Sun is 0.986. _____________W
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 are 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°C temperature increase?
Radiation makes it impossible to stand close to a hot lava flow. Calculate the rate of heat transfer by radiation in kilowatts from 1.00 m2 of 1100°C fresh lava into 25.0°C surroundings, assuming lava's emissivity is 1. ______ kW
The internal energy of an ideal gas depends on A) its pressure. B) its temperature. C) its temperature, pressure, and volume. D) its temperature and pressure. E) its volume.
A small metal cube with a thermal mass mc and an initial temperature 0 is dropped into a container of water that is actively maintained at a constant temperature 0w. The cube quickly comes to rest on the bottom surface of the container. The bottom surface is maintained at a constant temperature 0 (note that this is different from 0w). The thermal resistance between the cube and the water is Rcw while the thermal resistance between the bottom surface of the container and the cube is RCB. The temperature of the cube is denoted by 0c. a) Draw the system schematic indicating the assumed directions of the heat transfer rates. Label all the nodes and system parameters. b) Derive the governing equation for the temperature of the cube, 0c. c) Where does to appear in the system schematic and how does it affect the governing equations? d) Calculate the steady-state temperature of the cube, css, assuming the following system parameters: 0o = 21°C, 0B = 6°C, 0w = 0°C, Rcw = 2°C/W, and RCB = 4°C/W
A heater of total radiating surface area of 0.50 m2 is kept at a constant temperature of 100oC. The heater is in a room and keeps the room at a temperature of 25oC. If the emissivity of the heater is 0.8, what is the rate at which the heater supplies heat to the room? σ = 5.67 x 10-8 W/m2K4
Calculate the rate of energy transferred via radiation from the surface of a spherical ice cube with radius 0.014 m. The air temperature is 295 K and the surface of the ice cube is 273 K. The emissivity of the ice cube's surface is 0.24.
Large meteors sometimes strike the Earth, converting most of their kinetic energy into thermal energy. (a) What is the kinetic energy of a 109kg meteor moving at 25.0 km/s? (b) If this meteor lands in a deep ocean and 80% of its kinetic energy goes into heating water, how many kilograms of water could it raise by 5.0°C?
A concerned mother is dressing her child for play in the snow. The child’s skin temperature is 34.0°C and the outside air temperature is1.5°C. If the emissivity of the child’s skin is 0.710 and he has 0.0115 m2 of exposed skin area, what is the amount of energy transferred from his body to the surroundings in 1.00 h?
A molecule in Earth's atmosphere at 20 °C has a most probable energy E = kT/2 = 2.02 ×10-21 J E = kT =4.04 ×10-21 J E = 3 k T / 2 = 6.1 ×10-21 J that depends on the mass of the molecule