Coastal winds that shift from night to day illustrate
A) conduction.
B) convection.
C) radiation.
D) all about equally
Answer: B
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Which of the following is a general characteristic of the four jovian planets in our solar system?
A) They are significantly lower in average density than are the terrestrial planets. B) They have very high levels of volcanic and tectonic activity. C) They are made predominantly of elements heavier than hydrogen and helium. D) They rotate more slowly than the terrestrial planets.
Light of frequency 6.00 × 1014 Hz illuminates a soap film (n = 1.33 ) having air on both sides of it. When viewing the film by reflected light,
what is the minimum thickness of the film that will give an interference maximum when the light is incident normally on it? (c = 3.00 × 108 m/s) A) 24.0 nm B) 94.0 nm C) 188 nm D) 279 nm E) 376 nm
A solar heated house loses about 5.5 × 10^7 cal through its outer surfaces on a typical 24-h winter day. What mass of storage rock is needed to provide this amount of heat if it is brought up to initial temperature of 58°C by the solar collectors and the house is maintained at 23°C? (Specific heat of rock is 0.21 cal/g/°C.)
a. 1.4E+3 kg b. 7.5E+4 kg c. 7.5E+3 kg d. 7.5E+2 kg e. 1.6E+3 kg
You are driving along a highway at 25.0 m/s when you hear the siren of an emergency vehicle traveling at constant speed in the opposite direction on the other side of the highway
When the vehicle is approaching you, you hear the frequency of the siren as 2380 Hz, but when it is past you the frequency becomes 1680 Hz. What is the frequency of the siren? The speed of sound in air is 343 m/s. A) 1850 Hz B) 2000 Hz C) 2050 Hz D) 2010 Hz E) 1980 Hz