The most important agent of erosion is
A) water.
B) glaciation.
C) wind.
D) wave action.
Answer: A
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If it takes 50 J of energy to move 10 C of charge from point A to point B, what is the magnitude of the potential difference between points A and B?
A) 500 V B) 5.0 V C) 50 V D) 0.50 V
Earthquake activity is associated with
A) divergent, convergent, and transform plate boundaries. B) convergent and transform plate boundaries. C) divergent and convergent boundaries. D) transform plate boundaries.
A 12-kg projectile is launched with an initial vertical speed of 20 m/s. It rises to a maximum height of 18 m above the launch point. What is the change in mechanical energy caused by the dissipative (air) resistive force on the projectile during this ascent?
a. ?0.64 kJ b. ?0.40 kJ c. ?0.52 kJ d. ?0.28 kJ e. ?0.76 kJ
All isotopes are unstable which have proton number greater than
A) 73. B) 12. C) 83. D) 78. E) 26.