Need help with a-c. Thanks. (5%) Problem 17: During the day, heat from the Sun is absorbed
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Need help with a-c. Thanks.
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(5%) Problem 17: During the day, heat from the Sun is absorbed by the Earth's surface. It is then radiated into space at night. ▷ A 33% Part (a) Calculate the rate, in watts, at which this heat transfer through radiation occurs (almost entirely in the infrared) from 1.0 m² to the atmosphere at night. Assume the emissivity is 0.90, the temperature of the surface of the Earth is 15°C, and that of outer space is 2.7 K. Q/At = Grade Summary sin() cotan() atan() acotan() cosh() tanh() cos() asin() Degrees Submit Hints: 0% deduction per hint. Hints remaining: 1 tan() acos() sinh() cotanh() Radians Hint П ( 7 8 9 HOME 4 5 6 1 2 3 + - END 0 VO BACKSPACE DEL CLEAR ^^^ 1 * . Feedback I give up! Feedback: 0% deduction per feedback. Deductions Potential 0% 100% Submissions Attempts remaining: 5 (4% per attempt) detailed view A 33% Part (b) The intensity of the Sun's radiation at the Earth's distance is about 800 W/m², but only half of the incoming radiation is actually absorbed by the Earth's surface. What fraction of the rate of radiation absorption by the Earth's surface during the day is reemitted at night? A 33% Part (c) What is the maximum magnetic field strength, in microteslas, of the outgoing radiation, assuming it is a continuous wave? (5%) Problem 17: During the day, heat from the Sun is absorbed by the Earth's surface. It is then radiated into space at night. ▷ A 33% Part (a) Calculate the rate, in watts, at which this heat transfer through radiation occurs (almost entirely in the infrared) from 1.0 m² to the atmosphere at night. Assume the emissivity is 0.90, the temperature of the surface of the Earth is 15°C, and that of outer space is 2.7 K. Q/At = Grade Summary sin() cotan() atan() acotan() cosh() tanh() cos() asin() Degrees Submit Hints: 0% deduction per hint. Hints remaining: 1 tan() acos() sinh() cotanh() Radians Hint П ( 7 8 9 HOME 4 5 6 1 2 3 + - END 0 VO BACKSPACE DEL CLEAR ^^^ 1 * . Feedback I give up! Feedback: 0% deduction per feedback. Deductions Potential 0% 100% Submissions Attempts remaining: 5 (4% per attempt) detailed view A 33% Part (b) The intensity of the Sun's radiation at the Earth's distance is about 800 W/m², but only half of the incoming radiation is actually absorbed by the Earth's surface. What fraction of the rate of radiation absorption by the Earth's surface during the day is reemitted at night? A 33% Part (c) What is the maximum magnetic field strength, in microteslas, of the outgoing radiation, assuming it is a continuous wave?
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Vector Mechanics for Engineers Statics and Dynamics
ISBN: 978-0073398242
11th edition
Authors: Ferdinand Beer, E. Russell Johnston Jr., David Mazurek, Phillip Cornwell, Brian Self
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