The gush of steam that issues from the escape valve of a pressure cooker is relatively cool
A) close to the opening.
B) above the opening where vapor is visible.
C) both of these
D) none of the above
Answer: B
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If a fictional shrinking man shrinks proportionately to 1/10 his original height, his weight will be multiplied by
A) 0.1. B) 0.01. C) 0.001. D) 0.0001. E) none of the above
A rock from a volcanic eruption is launched straight up. Which one of the following statements about this rock while it is in the air is correct if you neglect the presence of air?
A) On the way up, its acceleration is downward and its velocity is upward, and at the highest point both its velocity and acceleration are zero. B) On the way down, both its velocity and acceleration are downward, and at the highest point both its velocity and acceleration are zero. C) Throughout the motion, the acceleration is downward, and the velocity is always in the same direction as the acceleration. D) The acceleration is downward at all points in the motion. E) The acceleration is downward at all points in the motion except that is zero at the highest point.
How much heat, in joules, is required to convert 1.00 kg of ice at 0°C into steam at 100°C? (Lice = 333 J/g; Lsteam = 2.26 × 10^3 J/g.)
a. 3.35 × 10^5 b. 4.19 × 10^5 c. 2.36 × 10^6 d. 2.69 × 10^6 e. 3.01 × 10^6
In order to understand the concept of temperature it is necessary to understand
a. the zeroth law of thermodynamics. b. the first law of thermodynamics. c. the second law of thermodynamics. d. all of the above. e. only (b) and (c) above.