A beaker is filled to the 500-ml mark with alcohol. What increase in volume (in ml) does the beaker contain when the temperature changes from 5°C to 30°C? (Neglect the expansion of the beaker, evaporation of alcohol and absorption of water vapor by alcohol.) ?alcohol = 1.12 × 10?4/°C
A. 0.47
B. 0.93
C. 1.4
D. 1.7
E. 2.5
Answer: C
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If the plane of the Earth's equator were not tilted with respect to the ecliptic plane,
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If you were to inhale a few breaths from a helium gas balloon, you would probably experience an amusing change in your voice. You would sound like Donald Duck or Alvin the Chipmunk. What is the cause of this curious high-pitched effect?
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What is the magnitude of the free-fall acceleration at a point that is a distance 2R above the surface of the Earth, where R is the radius of the Earth?
a. 4.8 m/s2 b. 1.1 m/s2 c. 3.3 m/s2 d. 2.5 m/s2 e. 6.5 m/s2
Two harmonic waves traveling in opposite directions interfere to produce a standing wave described by y = 2sin(4x)cos(3t), where x is in m and t is in s. What is the speed (in m/s) of the interfering waves?
a. 0.75 b. 0.25 c. 1.3 d. 12 e. 3.0