On Earth, according to current ideas about plate tectonics, ____________ were once together
a. Africa and South America
b. Africa and North America
c. North America and Europe
d. Africa and South America; Africa and North America; and North American and Europe
d
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Uniform Circular Motion: A car moving at a steady 10 m/s on a level highway encounters a depression that has a circular cross-section with a radius of 30 m. The car maintains its speed as it drives through the depression. What is the normal force exerted by the seat of the car on a 60.0-kg passenger when the car is at the bottom of the depression?
A. 200 N B. 390 N C. 790 N D. 490 N E. 590 N
The technique for producing single crystals of turbine blades is by a modification of
(a) Investment casting (b) Directional solidification (c) The Bridgeman-Stockbarger technique (d) The Czochralski technique
The theory of general relativity proves that wormholes like those used in science fiction cannot exist
Indicate whether the statement is true or false
The most abundant element in Earth's core is ________.
A. iron B. hydrogen C. oxygen D. nitrogen