(c) (1 point) If the escape speedwarf is speed from the surface of the statement
ID: 1482905 • Letter: #
Question
(c) (1 point) If the escape speedwarf is speed from the surface of the statements is true? (A) Vs = (0.01) vwo espeed from the surface of the Sun is vs, and the escape or the surface of the white dwarf is vwor . of the white dwarf is Vwo which one of the following (B) Vs = (0.01)" vwo (C) Vs = (0.01)32 VWD (D) vs-1(0.01) vwo (E) vs = vwo (F) none of the above at a planet orbiting the Sun remains on the same orbit me a white dwarf. The magnitude of the torque acting on (d) (1 point) Suppose that a planet orbitng thesanitude of after the Sun has become a white dwart th collapse, thatational force of the Sun before the collapse is ts; after is Two. Th e planet due to the gravitational force of the Sun be e collapse th of the torque the torque acting on the planet due to white dwarf , th e magnitude is e torque is calculated with respect to the position of the Sun/white dwarf. Which one of the following statements is true? (A) Ts > TwD (E) it could be any of the above, depending on whether the orbit is circular or elliptical (F) none of the above (C) TS-Two-0Explanation / Answer
RwD =0.01 Rs
(c ) escape speed v= [2GM/R]1/2
vs/vwD= [RwD/Rs]1/2= [0.01/Rs]1/2
vs =[0.01]1/2vwD
Correct option is (D)
(d) Net torque is zeroin two situtations.
From Keplers second law , angular moment is constant.
Correct option is (C)
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