A wood stove in the corner of a cabin causes the entire cabin to become heated. This is an example of
a. heat conduction.
b. heat convection.
c. heat radiation.
d. thermal expansion.
e. none of the above.
b
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In a typical 24 hour day, there are
A. one high tide and one low tide. B. one high tide and two low tides. C. two high tides and one low tide. D. two high tides and two low tides.
The acceleration of a Tesla that maintains a constant velocity of 120 km/h over a time of one-half hour is
A) 60 km/h. B) 120 km/h. C) 240 km/h. D) zero because of no change in velocity.
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
When an unstable nucleus decays by emitting an alpha particle, the atomic mass number of the nucleus
A) increases by 4. B) increases by 2. C) decreases by 2. D) decreases by 4. E) remains unchanged.