A man in a gym is holding an 8.0-kg object at arm's length, a distance of 0.55 m from his shoulder joint. What is the torque about his shoulder joint due to the object if his arm is horizontal?
A) 0.24 N ? m
B) 4.4 N ? m
C) 43 N ? m
D) 15 N ? m
E) 0 N ? m
C
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Most neutron stars are the remnants of _____ explosions
a. type II supernovae b. type Ib supernovae c. type Ia supernovae d. novae e. planetary nebulae
You stand with your heels against a wall and bend ninety degrees forward at the waist.
A. You fall forward because your center of gravity moves ahead of your base of support. B. You fall forward because of the momentum you gain when you move. C. You fall forward because the muscles in your feet aren't strong enough to stop you. D. You are able to maintain your balance.
The terrestrial planet with the oldest surface is ____________________
Fill in the blank(s) with correct word
What would you expect to be different in a planetary system in which the nebular gas is blown into interstellar space by a stellar wind earlier than occurred in our solar system?
A) No terrestrial planets would form. B) Jovian planets would be less massive because they had less time to gather hydrogen and helium gas. C) All planets would be more massive than Jupiter. D) Most of the planets would be destroyed by migration onto the central star.