In a delta environment the first grains to settle are

A) light, fine-grained sediment.
B) heavier, coarse-grained sediment.
C) light, medium-grained sediment.
D) heavy and light mixed grains.

Answer: B

Physics & Space Science

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Which of the following statements is NOT true about neutron stars?

a. They resist collapse with a pressure that stems from the Pauli exclusion principle. b. If the mass of the neutron star is more than 3 solar masses, it can continue to collapse and become a black hole. c. Some of the neutrons inside were formed from an electron-proton interaction. d. Neutron stars are believed to be the explanation for pulsars. e. The formation of neutron stars is a process known to absorb neutrinos.

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The Oort Cloud is thought to be

A) the cloud of gas and dust from which our solar system formed. B) a cloud of debris that occasionally encounters the Earth, causing a meteor shower. C) the spherical cloud of comets and some larger icy bodies surrounding the outer solar system. D) a cloud of asteroids moving between the orbits of Mars and Jupiter. E) the material in the ecliptic plane that creates the zodiacal light.

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The average density of each planet in the solar system is determined by taking its mass and dividing that by its

A) radius. B) diameter. C) surface area. D) radius squared. E) volume.

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If you toss a ball straight upward at 40 m/s with no air resistance, one second before it reaches the top of its path its speed is

A) zero. B) 10 m/s. C) 20 m/s. D) 30 m/s E) 40 m/s.

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