Glaciers will retreat when the amount of accumulation
A) is less than the amount of ablation each year.
B) exceeds the amount of ablation each year.
C) is equal to the amount of ablation.
Answer: A
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A car travels at 50.0 km/hr for 2.00 hours. It then travels an additional distance of 40.0 km in 1.00 hour. The average speed of the car for the entire trip is
A. 61.0 km/hr. B. 57.1 km/hr. C. 53.3 km/hr. D. 46.7 km/hr. E. 30.0 km/hr.
A current-carrying loop of wire lies flat on a horizontal tabletop. When viewed from above, the current moves around the loop in a counterclockwise sense. For points on the tabletop inside the loop, the magnetic field lines caused by this current
A) circle the loop in a clockwise direction. B) circle the loop in a counterclockwise direction. C) point straight up. D) point straight down.
When light passes at an angle to the normal from one material into another material in which its speed is higher,
a. it is bent toward the normal to the surface. b. it always lies along the normal to the surface. c. it is unaffected. d. it is bent away from the normal to the surface.
On a PV diagram, 2 curves are plotted, both starting at the same point and both ending at the same final increased volume. One curve is for an isothermal process; the other is for an adiabatic process. What does the area between these two curves represent?
a. Q absorbed by the isothermal process. b. W done by the adiabatic process. c. ?U for the isothermal process. d. Neither Q, W, nor ?U for either of the processes is represented.