Jupiter's mass is about ________ times that of Earth, and its diameter is ________ times Earth's.
A. 300; 10
B. 100; 300
C. 10; 300
D. 30; 10
Answer: A
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A turntable has a moment of inertia of 3.00 × 10^?2 kg·m2 and spins freely on a frictionless bearing at 25.0 rev/min. A 0.600-kg ball of putty is dropped vertically on the turntable and sticks at a point 0.100 m from the center. By what factor does the angular momentum of the system change after the putty is dropped onto the turntable?
a. 1.22 b. 1.00 (no change) c. 0.820 d. 1.20
The Bohr model pictures a hydrogen atom in its ground state as a proton and an electron separated by the distance a0 = 0.529 × 10?10 m. The electric potential created by the proton at the position of the electron is
A. ?13.6 V. B. +13.6 V. C. ?27.2 V. D. +27.2 V. E. +5.12 × 109 V.
The graph for position versus time is given for a car. What can you say about the velocity of the car over time?
A. it speeds up all the time
B. it slows down all the time
C. it moves at constant velocity
D. sometimes sometimes
it speeds up and it slows
E. not really sure
The atmosphere on Mercury is due to
A) volcanic outgassing. B) evaporation. C) sublimation. D) bombardment. E) There is no detectable atmosphere on Mercury.