Show that the average intensity of the sun's disk as seen from a distance d from the sun's center is given by p/ (4π2r2), where the total radiant power output is p (joules per second) and the solar radius is r. for simplicity, assume that the sun's intensity i is the same at all points on the visible disk. you will need to derive an exact expression for the solid angle subtended by the sun's disk for d r. note that your final solution for i should not depend on d! no matter how far you are from the sun, the intensity is the same. recognizing that energy is conserved, how is it possible that this is true? give a qualitative explanation.
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Physics, 21.06.2019 14:50
Acylindrical specimen of a nickel alloy having an elastic modulus of 207 gpa (30 × 106psi) and an original diameter of 10.2 mm (0.40 in.) experiences only elastic deformation when a tensile load of 8900 n (2000 lbf) is applied. compute the maximum length of the specimen before deformation if the maximum allowable elongation is 0.25 mm (0.010 in.)
Answers: 3
Physics, 21.06.2019 19:40
Apackage of supplies is dropped from a plane, and one second later a second package is dropped. neglecting air resistance, the relative velocity of the 1st package viewed from the second will 56) a) increase. b) be constant. c) be zero. d) depend upon their weight. e) decrease
Answers: 1
Physics, 22.06.2019 03:00
Which of the following harmful chemicals are found in tobacco smoke? a. carbon monoxide b. carbon dioxide c. nicotine b. carbon dioxide d. both a and c
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Physics, 22.06.2019 04:30
You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?
Answers: 2
Show that the average intensity of the sun's disk as seen from a distance d from the sun's center is...
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