Radiative energy is ________
A) energy from nuclear power plants B) heat energy
C) energy of motion D) energy carried by light
D
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If an object is located 20 m to the right of the origin at 1:00 PM, and later the object is located 30 m to the right of the origin at 2:00 PM, then the displacement from 1:00 PM to 2:00 PM is
A. 50 m to the right. B. 30 m to the right. C. 25 m to the right. D. 20 m to the right. E. 10 m to the right.
Gamma rays have a very small
A) energy. B) frequency. C) mass. D) wavelength.
How is the circumference, Cn, of the nth orbit in hydrogen and the de Broglie wavelength, 
of the n th orbit related?
a. 
b. 
c. 
d. 
e. 
An isotope of Tc having a half-life of 6.0 h is used in bone scans. If a certain amount of this Tc is injected into the body, how long does it take for its initial decay rate to decrease BY 99%?
A) 0.060 h B) 3.3 h C) 33 h D) 40 h E) slightly more than a month