Which spectrum is shown above?
a. continuous
b. emission
c. absorption
d. blackbody
C
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When we speak of time dilation, we mean that time
A) compresses with speed. B) stretches with speed. C) is constant at all speeds.
The atomic mass number of a nucleus is equivalent to which of the following numbers?
a. number of neutrons present b. number of protons present c. difference in neutron and proton numbers d. sum of neutron and proton numbers
Power: When a 14.0-A current flows through an 8.00-? device for 24.0 hours, how much does this cost if energy costs $0.0900 per kW ? h?
A. $0.24 B. $1.04 C. $2.16 D. $3.39
The place in a planet's orbit that is closest to the Sun is called:
A) vernal equinox. B) aphelion. C) perihelion. D) crossing the ecliptic. E) None of these; a planet's distance from the Sun never changes.