Latent Heats: A runner generates 1260 W of thermal energy. If this heat has to be removed only by evaporation, how much water does this runner lose in 15 minutes of running? The latent heat of vaporization of water is 22.6 × 105 J/kg.
A. 50 g
B. 500 g
C. 35 g
D. 350 g
E. 40 g
Answer: B
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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.
An example of the universe's large-scale filamentary structure is the ________
Fill in the blank(s) with correct word
The concept that the direction of observation does not matter overall is:
A) relativity. B) homogeneity. C) universality. D) isotropy. E) geometry.
A car with a radio antenna 1.0 m long travels at 80 km/h in a locality where the Earth's magnetic field is 5.0 × 10^-5 T. What is the maximum possible emf induced in the antenna as a result of moving through the Earth's magnetic field?