A 35 N-force toward the west is applied to an object. The object moves 20 m east during the time the force is applied. What is the change in kinetic energy of the object?
A) 0.0 J
B) 0.57 J
C) 1.0 J
D) -700 J
E) 350 J
D
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What is at the center of a planetary nebula?
A: the core of the dying star B: something that will eventually become a neutron star C: something that will eventually become a white dwarf D: both A and B E: both A and C
Light which reflects off a pond of water undergoes a phase shift of
A) 90°. B) 180°. C) 0°. D) 270°. E) 45°.
Quantum field theory arises out of the combination of
A) quantum theory and nuclear physics. B) the general theory of relativity and quantum theory. C) the special theory of relativity and the theory of electromagnetism. D) the special theory of relativity and quantum theory. E) quantum theory and the big bang theory of the creation of the universe.
An advantage of synthetic detergents over soaps is that they
a. do not contain sulfur. b. dissolve grease. c. do not form scum in hard water. d. are more readily biodegradable.