Escape Speed: The value of g at the surface of spherical Asteroid X is 0.00600 m/s2, and the escape speed is 9.95 m/s. What is the radius of this asteroid? (G = 6.67 × 10-11 N ? m2/kg2)
A. 8250 m
B. 16,000 m
C. 1600 m
D. 800 m
E. 400 m
Answer: A
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A star with the mass of our Sun will go through several stages of energy generation through fusion. Which sequence accurately describes these stages in the correct order?
a. hydrogen core ? hydrogen shell ? helium shell ? helium core b. hydrogen core ? helium core ? hydrogen shell ? helium shell c. hydrogen core ? hydrogen shell ? helium core ? helium shell ? carbon core d. hydrogen core ? hydrogen shell ? helium core ? helium shell e. hydrogen shell ? hydrogen core ? helium shell ? helium core
How many types of fundamental particles are there in the Universe and how many dominate on Earth?
A. About 30 with 3 dominant B. More than a million with 3 dominant C. About 300 with 30 dominant D. About 300 with 3 dominant E. About 30 with 15 dominant
The discussion of the "launched apple" and the Moon shows that the
A. velocities of the apple and Moon are constant. B. motion of the Moon and apple can be explained by the same laws. C. apple and the Moon have the same acceleration. D. apple and the Moon experience the same-sized force.
To increase the applied torque one can
A. Increase the force B. Increase the lever arm by moving to the end of the lever C. Increase the lever arm by applying the force perpendicularly to the lever D. All of the above E. None of the above