Physics for Scientists and Engineers
6th Edition
ISBN: 9781429281843
Author: Tipler
Publisher: MAC HIGHER
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Chapter 11, Problem 7P
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Chapter 11 Solutions
Physics for Scientists and Engineers
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- After our Sun exhausts its nuclear fuel, its ultimate fate may be to collapse to a white dwarf state, in which it has approximately the same mass as it has now but a radius equal to roughly the size of the Earth's radius. (a) Calculate the average density of this white dwarf if the Sun were to collapse to a radius of 6.27 x 10€m. | kg/m3 (b) Calculate the free-fall acceleration at its surface. m/s2 (c) Calculate the gravitational potential energy of a 3.00 kg object at its surface. (Take Ug = 0 at infinity.)arrow_forwardThe radius Rhand mass Mh of a black hole are related by R₁ = 2GM₁/c², where c is the speed of light. Assume that the gravitational acceleration as of an object at a distance r= 1.001Rh from the center of a black hole is given by ag = GM/r² (it is, for large black holes). (a) In terms of Mh, find ag at ro. (b) Does sag at ro increase or decrease as M₁ increases? (c) What is ag at ro for a very large black hole whose mass is 1.54 × 10¹3 times the solar mass of 1.99 × 10³⁰ kg? (d) If an astronaut with a height of 1.66 m is at råwith her feet toward this black hole, what is the difference in gravitational acceleration between her head and her feet ahead-afeet? (e) Is the tendency to stretch the astronaut severe?arrow_forwardAn astronaut marooned on the surface of an asteroid, of radius r and mean density equal to that of the Earth, finds that he can escape by jumping. What is the maximum value of r?arrow_forward
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