Which sector has consistently used the greatest percentage of energy in the United States?
Answer: Transportation
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A brass rod, 75.0 cm long and having a cross-sectional area of 2.50 cm2, conducts heat from a large furnace at 375°C into a very large cold water bath at 10.0°C
without losing any heat at the lateral surface of the rod. Steady state has been established, and the thermal conductivity of brass is 109 W/m?K. The rate at which the entropy of the system (furnace plus water) is changing is closest to A) 2.05 × 10-2 W/K. B) 2.64 × 10-2 W/K. C) 3.54 × 10-2 W/K. D) 4.69 × 10-2 W/K. E) 6.74 × 10-2 W/K.
Spherical Mirrors: A beam of light that is parallel to the principal axis strikes a convex mirror. What happens to the reflected beam of light?
A. It also is parallel to the principal axis. B. It is perpendicular to the principal axis. C. It appears to be coming from the focal point on the other side of the mirror. D. It appears to be coming from the center of curvature of the mirror. E. It appears to be coming from a point between the focal point and the center of curvature of the mirror.
Near the surface of the planet, the Earth's magnetic field is about 0.50 × 10^?4 T. How much energy is stored in 1.0 m3 of the atmosphere because of this field?
Venus and Earth started out with roughly the same amount of water. While Earth still has water in abundance, all of Venus' was lost. Where did it go?
A) It chemically combined with CO2 to form H2CO3. B) Ultraviolet rays split the hydrogen from the oxygen components, and the hydrogen escaped into space. C) It all evaporated into space due to the intense daytime heat of 470°C. D) Scientists are still trying to determine this.