What percent of soil is pore space?
What will be an ideal response?
100%
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The moons of Mars are believed to be
a. composed primarily of iron and nickel. b. composed primarily of frozen gases of water and carbon dioxide. c. orbiting Mars in a direction opposite to the direction that Mars rotates. d. formed from material ejected from Olympus Mons and other large volcanoes on Mars. e. captured asteroids.
The most abundant element in Saturn's atmosphere is
A) ammonia. B) hydrogen. C) helium. D) methane. E) nitrogen.
A 900-kg car traveling east at 15.0 m/s suddenly collides with a 750-kg car traveling north at 20.0 m/s. The cars stick together after the collision. In what direction does the wreckage move just after the collision?
A) 36.9° N of E B) 42.0° N of E C) 45.0° N of E D) 53.1° N of E E) 48.0° N of E
The position of an object that is oscillating on a spring is given by the equation
x = (18.3 cm) cos[(2.35 s-1)t]. What are the (a) frequency, (b) amplitude, and (c) period of this motion?