Subduction on the Earth is the process by which
A) dense material sank while lighter material rose to the surface during the early geological history
B) molten lava oozes out between two tectonic plates that are slowly moving apart
C) volcanic material flows from the deep interior to produce volcanic islands
D) oceanic crust sinks below continental crust at a tectonic plate boundary
D
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Doubling the power output from a speaker emitting a single frequency will result in what increase in loudness?
a. 0.33 dB c. 4.8 dB b. 3.0 dB d. 9.0 dB
General Questions: A box is placed on a table which rests on the floor. The box pushes on the table; the reaction force to the box's push on the table is the table's push on the floor.
A. True B. False
A charge of +80 ?C is placed on the x axis at x = 0 . A second charge of ?50 ?C is placed on the x axis at x = 50 cm. What is the magnitude of the electrostatic force on a third charge of 4.0 ?C placed on the x axis at x = 30 cm?
a. 13 N b. 77 N c. 39 N d. 25 N e. 45 N
A car has a mass of 930 kg has wheels with a radius of 35 cm, and the distance between the axles is 3.1 m. The coefficient of static friction between the tires and the road is 0.52
It is equipped with anti-lock brakes so that the tires do not slide when it is braking. If the weight of the car is supported equally by the four tires, what is the total torque on the tires exerted by the forces between the tires and the horizontal road when there is maximum braking, i.e. when the tires are about to slip? A) 1.2 × 102 N m B) 1.7 × 103 N m C) 1.2 × 104 N m D) 1.6 × 102 N m E) 1.4 × 104 N m