According to relativity theory, it is possible to reverse time and grow younger when you
A) are near a black hole.
B) are near a very large gravitational field.
C) travel at nearly the speed of light.
D) you can never grow younger.
E) none of these
Answer: D
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What will be an ideal response?
The change in momentum that occurs when a 1.0 kg ball traveling at 4.0 m/s strikes a wall and bounces back at 2.0 m/s is
A) 2 kg m/s. B) 4 kg m/s. C) 6 kg m/s. D) 8 kg m/s.
A 4.0-kg block is lowered down a 37° incline a distance of 5.0 m from point A to point B. A horizontal force (F = 10 N) is applied to the block between A and B as shown in the figure. The kinetic energy of the block at A is 10 J and at B it is 20 J. How much work is done on the block by the force of friction between A and B?
a.
?58 J
b.
?53 J
c.
?68 J
d.
?63 J
e.
?47 J
One mole of hydrogen, one mole of nitrogen and one mole of oxygen are held in a 22.4 × 103 cm3 enclosed vessel at 20°C. The pressure in the vessel, in N/m2, is
A. 109. B. 304. C. 326. D. 1.09 × 105. E. 3.26 × 105.