What type of stresses broke Earth's lithosphere into plates?
A) impacts of asteroids and planetesimals
B) internal temperature changes that caused the crust to expand and stretch
C) the circulation of convection cells in the mantle, which dragged against the lithosphere
D) cooling and contracting of the planet's interior, which caused the mantle and lithosphere to be compressed
E) volcanism, which produced heavy volcanoes that bent and cracked the lithosphere
C
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Pressure in a Liquid: Consider a brick that is totally immersed in water, with the long edge of the brick vertical. The pressure on the brick is
A. the same on all surfaces of the brick. B. greatest on the face with largest area. C. greatest on the top of the brick. D. greatest on the sides of the brick. E. greatest on the bottom of the brick.
You are asked to select a polymer for a design where the temperature could vary between 0°C and 100°C, and it is desired that the polymer’s mechanical properties should not significantly change over this temperature range. What type of polymers would you initially investigate for this design, and why would you make this selection?
What will be an ideal response?
A cart has an initial velocity of 5.0 m/s to the right and a constant acceleration of 2.0 m/s2 to the right. What is the cart's displacement during the first 6.0 s of this motion?
A) 10 m B) 55 m C) 66 m D) 80 m
The symbol G is used to represent
a. the acceleration of gravity. b. the universal gravitational constant. c. grams. d. gravity. e. none of the above.