A pressure of 1012 mb is indicated on a weather map. Is this pressure high or low? Explain
A pressure reading of 1012 mb may indicate a high- or low-pressure cell. The reading
depends on the value of the pressure for the surrounding area but the reading is a
little lower than the value generally associated with normal atmosphere pressure at
sea level.
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A rod has a length 2.00000 m at 10.0°C. The length of the rod increases to 2.00060 m when the temperature increases to 30.0°C. What is the coefficient of linear expansion of the material from which the rod is made?
A) 2.0 × 10-5/K B) 2.5 × 10-5/K C) 1.5 × 10-5/K D) 1.0 × 10-3/K E) 1.0 × 10-5/K
The interval from new Moon to first quarter is about a(n)
A) hour. B) day. C) week. D) month. E) year.
As a 3.0-kg bucket is being lowered into a 14-m-deep well, starting from the top, the tension in the rope is 9.0 N. The acceleration of the bucket will be:
a. 6.8 m/s2 downward. b. 9 m/s2 downward. c. zero. d. 3.0 m/s2 upward. e. 6.8 m/s2 upward.
If the frequency of a traveling wave train is increased by a factor of four in a medium where the speed is constant, which of the following is the result?
a. amplitude is one fourth as big c. wavelength is quadrupled b. amplitude is quadrupled d. wavelength is one fourth as big