As the speed of a moving fluid increases, the pressure in the fluid
A)
increases.
B)
remains constant.
C)
decreases.
D)
may increase or decrease, depending on the viscosity.
C
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If you place a plane mirror vertically into water, and a dolphin moves toward it with a speed of 4 m/s, she will see her image move toward her at a relative speed of
A) 6. m/s. B) 10. m/s. C) 2. m/s. D) 4. m/s. E) 8. m/s.
Two cars collide head-on. At every moment during the collision, the magnitude of the force the first car exerts on the second is exactly equal to the magnitude of the force the second car exerts on the first. This is an example of
A) Newton's first law. B) Newton's second law. C) Newton's third law. D) Newton's law of gravitation.
Wet cooling towers are the most efficient way to eliminate waste heat
What will be an ideal response?
What lucky factor prevented the Chelyabinsk object from causing much damage at ground level?
A) It was made entirely of ices and thus exploded high in the air. B) It hit Earth at an oblique angle and thus exploded high in the air. C) A prototype asteroid defense system was being tested nearby.