One of water's interesting thermal properties is that when heated it takes a relatively
A) long time in changing temperature.
B) short time in changing temperature.
C) same amount of time to cool.
D) none of the above
Answer: A
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If the accepted value of H were to double,
A) the critical density would be halved. B) the age of the universe would be twice as old as we originally believed. C) the age of the universe would be half what we believed. D) the ages of the oldest globular clusters would be invalid. E) the Copernican principle would not be valid beyond our solar system.
The energy used by a 100 watt light bulb in 1 hour is 360,000 joules
Indicate whether the statement is true or false
As temperatures become large, the denominator in equation T4.41 becomes
A. very large. B. very small. C. approximately 1. D. approximately ?1
A conducting bar of length L rotates in a counterclockwise direction with a constant angular speed of +2.0 rad/s about a pivot P at one end, as shown. A uniform magnetic field (magnitude = 0.20 T) is directed into the paper. If L = 0.40 m, what is the potential difference, VA?VB?
A. +24 mV B. ?24 mV C. +16 mV D. ?16 mV E. +32 mV