The largest volumes of magma extruded on the continents are
A) flood and plateau basalts.
B) central-vent type volcanoes.
C) batholiths.
D) from volcanoes with a high silica content.
Answer: A
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The greatest contribution of the Greeks to modern thought was:
A) the idea that all the planets orbited the Sun. B) that their mythology was the basis for the naming of the constellations. C) that their observation of stellar parallax proved the Earth orbited the Sun. D) the development of scientific inquiry and model building. E) the invention of the telescope.
The foot pedal on hydraulic brake system exerts a force of 45 lbs on a piston with a diameter of 1.00 cm. The brake fluid in the brake system exerts the pressure from the foot pedal on a brake pad piston with a diameter of 2.50 cm. The force on the brake pad is
A. 133 lbs. B. 150 lbs. C. 281 lbs. D. 350 lbs. E. 402 lbs.
A 330-g air track cart on a horizontal air track is attached to a string that goes over a pulley with a moment of inertia of 5.00 x 10-6 kg?m2 and a radius of 1.35 cm. A 255-g mass hangs from the other end of the string and is released
What is the acceleration of the cart? A) 9.72 m/s2 B) 7.14 m/s2 C) 6.53 m/s2 D) 4.74 m/s2 E) 4.08 m/s2
The mid-oceanic ridge systems in the Atlantic and Pacific oceans are
A) high points in the ocean basins where new crust is being made. B) the tallest features in Earth's ocean basins. C) some of the oldest rock formations on Earth's surface.