The principle of continuity states that for fluid flow to be continuous it must
A) speed up in narrow regions of flow.
B) slow down in wide regions of flow.
C) both of these
D) neither of these
Answer: C
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If 2.0 g of water at 0.00°C is to be vaporized, how much heat must be added to it? The specific heat of water is 1.0 cal/g ? K, its heat of fusion is 80 cal/g, and its heat of vaporization is 539 cal/g
A) 1100 cal B) 1100 kcal C) 1200 cal D) 1300 cal E) 1500 cal
State the First Law of Thermodynamics
What will be an ideal response?
What makes some astronomers think that Uranus was hit by a large body early in its history?
A. It has no moons. B. It goes around the Sun in a direction opposite to the other planets. C. Its composition is so different from those of Neptune, Jupiter, and Saturn. D. Its rotation axis has such a large tilt with respect to its orbit. E. All of these choices are correct.
A certain automobile tire has a volume of 0.0185 m3. If the absolute (or total) pressure in the tire is 500 kPa and the temperature is 298 K, how many molecules are there inside the tire? (R = 8.31 J/mol ? K, NA = 6.022 x 1023 molecules/mol)
A) 3.25 × 1023 molecules B) 3.25 × 1025 molecules C) 3.25 × 1024 molecules D) 2.25 × 1023 molecules E) 2.25 × 1024 molecules