When light passes from water into air, it bends:
A) away from the perpendicular. B) at a 45° angle to the surface of the water.
C) more slowly. D) towards the perpendicular.
A
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Saudi Arabia contains approximately ________ percent of the world's known oil supplies.
A) 40 B) 10 C) 50 D) 5 E) 20
What changes the compensation depth?
A) Salinity B) Temperature C) Density D) None of these choices
Enrichment of nuclear fuel
A) increases the relative concentration of uranium-235 to only 3 to 5% in order to avoid any possibility nuclear explosion at higher percentages. B) increases the relative concentration of uranium-235 to 30 to 50% in order to avoid a nuclear explosion at higher percentages. C) decreases the relative concentration of uranium-235 from 60% to only 3 to 5% in order to avoid a nuclear explosion at higher percentages. D) decreases the relative concentration of uranium-235 from 100% to 30 to 50% in order to avoid a nuclear explosion at higher percentages.
Radom National Park in South Sudan is an example of ________ typified by perennial tall grasses, about 10–49 percent tree cover to areas of open grassland interspersed with small trees
A) steppe B) desert C) rainforest D) savanna