If the initial speed of a projectile is doubled
A) Its range will be increased by 1.41.
B) Its range will double.
C) Its range will be decreased by a factor of two.
D) Its range will quadruple.
E) Its range will decrease by a factor of four.
D
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A black hole is
A) a region of space that is collapsed in on itself. B) the result of the collapse of supergiant star. C) likely found at the center of each spiral galaxy. D) All of the above
Two identical containers, A and B, hold equal amounts of the same ideal gas at the same Po, Vo and To. The pressure of A then decreases by a half while its volume doubles; the pressure of B doubles while its volume decreases by a half. Which statement correctly describes the temperatures of the gases after the changes?
A. TA = 0.5TB = To. B. TB = 0.5TA = To. C. TB = TA = To. D. TA = 2TB = To. E. TB = 2TA = To.
The figure shows two point sources of light, A and B, that emit light waves in phase with each other. A is a distance of 3? from point P. B is distant 5? from P. (? is the wavelength.) The phase difference between the waves arriving at P from A and B is
?
?
a.
0 rad.
b.
? rad.
c.
2? rad.
d.
3? rad.
e.
4? rad.
Recall Galileo's Leaning Tower experiment. With negligible air resistance, a heavy and a light object fall
A) with equal accelerations. B) with the same increases in speed. C) to the ground in equal times. D) all of the above