What factors increase salinity in the ocean? What factors decrease salinity?
What will be an ideal response?
Answer: Salinity increases as the supply of fresh water decreases. Factors that increase salinity include formation of sea ice and evaporation. Salinity decreases as the supply of fresh water increases. Factors that decrease salinity include the runoff from streams and rivers, precipitation, and the melting of glacial ice, sea ice, and icebergs.
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Kepler's Laws: Halley's Comet is in a highly elliptical orbit around the sun. Therefore the orbital speed of Halley's Comet, while traveling around the sun,
A. is constant. B. increases as it nears the Sun. C. decreases as it nears the Sun. D. is zero at two points in the orbit.
Free Fall: Brick A is dropped from the top of a building. Brick B is thrown straight down from the same building, and neither one experiences appreciable air resistance. Which statement about their accelerations is correct?
A. The acceleration of A is greater than the acceleration of B. B. The acceleration of B is greater than the acceleration of A. C. The two bricks have exactly the same acceleration. D. Neither brick has any acceleration once it is released.
Opposing shearing forces of 3000 N are applied to the 3.00 cm × 4.00 cm faces of a 3.00 cm × 4.00 cm × 5.00 cm steel block. By what amount does the block become slanted? The shear modulus for steel is 8.0 × 1010 N/m2
A) 1.54 × 10-6 m B) 5.56 × 10-7 m C) 9.88 × 10-7 m D) 3.08 × 10-6 m E) 6.98 × 10-6 m
The hardest mineral on the Mohs hardness scale is named ______________
Fill in the blank(s) with correct word