Two athletes jump straight up. John has twice the initial speed of Harry. Compared to Harry, John stays in the air
A) 0.50 times as long as Harry.
B) the same time as Harry.
C) twice as long as Harry.
D) three times as long as Harry.
E) four times as long as Harry.
C
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Loops of glowing hydrogen seen hanging over the solar limb during totality are
A) solar rainbows. B) haloes. C) prominences. D) filaments. E) flares.
As a result of friction between internal parts of an isolated system
a. the total mechanical energy of the system increases. b. the total mechanical energy of the system decreases. c. the total mechanical energy of the system remains the same. d. the potential energy of the system increases but the kinetic energy remains the same. e. the kinetic energy of the system increases but the potential energy of the system remains the same.
Nuclear Binding Energy: The stability of 
C with respect to alpha, beta-plus and beta-minus decay is to be determined. The following atomic masses are known:
A. not subject to alpha, beta-plus or beta-minus decay. B. subject to alpha decay only. C. subject to beta-plus decay only. D. subject to beta-minus decay only. E. subject to beta-plus or beta-minus decay, but not to alpha decay.
The major moons of ______________ were named after literary characters
Fill in the blank(s) with correct word