During the formation of the oceans, erosion of the Earth most significantly led to what?


Ans: the salt in the water

Physics & Space Science

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If sufficient force is applied to a crystal, it can be permanently deformed. Permanent deformation in metal crystals occurs due to atomic displacements on the planes that are most closely packed, and it happens in the most closely packed directions. Assume that a force is applied to a crystal of FCC copper that permanently stretches the crystal in the [001] direction. The (111) plane is one of the close-packed planes in FCC copper on which permanent deformation could occur.

(a) What is the angle between the [001] direction and the normal to the (111) plane? (b) Atom displacements along which close-packed directions within the (111) plane could contribute to the permanent deformation of the crystal in the [001] direction?

Physics & Space Science

According to the "galactic fountain" model, what can create a superbubble emerging into the halo?

A) winds and jets from newly formed protostars B) a supernova occurring in the halo C) multiple supernovae occurring near one another around the same time D) the combined effect of spiral density waves E) molecular clouds expelled from the galactic center

Physics & Space Science

As a tile falls from the roof of a building to the ground its momentum is conserved

A) True B) False

Physics & Space Science

A single slit, 1,400 nm wide, forms a diffraction pattern when illuminated by monochromatic light of 490-nm wavelength. What is the largest angle from the central maximum at which the intensity of the light is zero?

A) 44° B) 41° C) 38° D) 35° E) 32°

Physics & Space Science