A 6.0-kg object moving 2.0 m/s in the positive x direction has a one-dimensional elastic collision with a 4.0-kg object moving 3.0 m/s in the opposite direction. What is the total kinetic energy of the two-mass system after the collision?
a. 30 J
b. 62 J
c. 20 J
d. 44 J
e. 24 J
a
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A ray of light is incident on a liquid-to-glass interface at an angle of 34.1°. Indices of refraction for the liquid and glass are, respectively, 1.93 and 1.64 . What is the angle of refraction for the ray moving through the glass?
a. 23.9° b. 28.5° c. 41.3° d. 29.0° e. 40.6°
What is the relativistic kinetic energy of an electron moving at a speed of 2.30 × 10^8 m/s? (electron mass is 9.11 × 10^?31 kg and c = 3.00 × 10^8 m/s)
a. 4.57E–14 J b. 1.28E–13 J c. 5.26E–14 J d. 3.38E–14 J e. 8.20E–14 J
If Q = 16 nC, a = 3.0 m, and b = 4.0 m, what is the magnitude of the electric field at point P?
a.
33 N/C
b.
31 N/C
c.
24 N/C
d.
19 N/C
e.
13 N/C
Which of the following statements about Earth's troposphere is not generally true?
A) It is the lowest layer of the atmosphere. B) It is the layer of the atmosphere in which convection plays the most important role. C) It is the layer of the atmosphere in which ozone absorbs dangerous ultraviolet light from the Sun. D) It is a layer of the atmosphere in which temperature declines with increasing altitude.