If an electron is accelerated from rest through a potential difference of 100 V, what is its de Broglie wavelength?
A. 
B. 
C. 
D. 
E. 
B.
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What is the temperature of 3.00 moles of an ideal gas at a pressure of 250 kPa held in a volume of 25.0 L?
A) 509 K B) 90.5 K C) 752 K D) 272 K E) 251 K
For finding the distance to M31, Hubble relied upon
A) planetary nebulae near its core. B) Cepheid variables in its spiral arms. C) Type I supernova in its core. D) Type II supernova in its spiral arms. E) RR Lyrae stars in its globular clusters.
A monochromatic (single frequency, single wavelength) light ray in air (n = 1) enters a glass prism (n = 1.5). In the glass prism
a. both the frequency and the wavelength are the same as in air b. the frequency is the same, but the wavelength is greater than in air. c. the frequency is the same, but the wavelength is smaller than in air. d. the wavelength is the same, but the frequency is greater than in air. e. the wavelength is the same, but the frequency is smaller than in air.
A copper cable is to be designed to carry a current of 300 A with a power loss of only 2.0 watts per meter. What is the required radius of the copper cable? (The resistivity of copper is 1.7 × 10^-8 W × m.)