Three forces act on the object in the sketch. In what direction will the object move?
A. To the left
B. To the right
C. To the left and up
D. Upward
E. To the right and up
Answer: E
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According to the theory of cosmic inflation, the universe
A) began as the result of the "big crunch" collapse of some pre-existing universe. B) began from a powerful electromagnetic effect in vacuum. C) had no beginning but instead has always existed. D) began as a tiny fragment of space and time. E) began when two very massive pre-existing particles collided and annihilated with each other.
A limitation of all electric automobiles is
A. Low energy density per battery. B. Batteries explode more readily than gasoline. C. Electric energy is not useful for autos. D. Electric motors are less efficient than gasoline motors.
When you walk at an average speed of 4 m/s, in 5 s you'll cover a distance of
A) 2 m. B) 10 m. C) 15 m. D) 20 m.
What type of igneous formation would agree with the principle of superposition?
What will be an ideal response?