A quantum of electromagnetic radiation is a __________
Fill in the blank(s) with correct word
photon
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Two metal rods, one silver and the other gold, are attached to each other end-to-end. The free end of the silver rod is immersed in a steam chamber at 100°C,
and the free end of the gold rod in an ice water bath at 0°C. The rods are both 5.0 cm long and have a square cross-section that is 2.0 cm on a side. No heat is exchanged between the rods and their surroundings, except at the ends. How much total heat flows through the two rods each minute? The thermal conductivity of silver is 417 W/m ? K, and that of gold is 291 W/m ? K. A) 8.2 kJ B) 9.5 kJ C) 12 kJ D) 14 kJ E) 16 kJ
Let the charge density in a certain region of space be ?. The electric field 
in that region points in the +x direction with 
= constant. This implies
A. that ? is positive in that region. B. that ? is negative in that region. C. that ? is zero in that region. D. that the field is physically impossible. E. nothing useful about the region’s charge density.
A ray of light enters an equilateral prism made of material with n = 1.45 at an angle of incidence 
The internally refracted ray is parallel to the base of the prism. What is the angle of refraction for the ray leaving the prism?
A. 46.5 
B. 30.0 
C. 20.2 
D. 15.7 
E. the ray won't leave the prism
The combining of two nuclei to form a larger nucleus with the release of energy is
a. nuclear fission. b. nuclear fusion. c. neutron activation. d. nuclear emission. e. beta decay.