The very first subatomic particle discovered was the

A. muon.
B. electron.
C. proton.
D. quark.
E. neutron.


Answer: B

Physics & Space Science

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The property of cleavage reflects:

-the luster of the mineral. -the hardness of the mineral. -the streak of the mineral. -mechanical breakage along planes of weakness within the mineral. -the density of the mineral.

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Metamorphism occurs for which class of rocks?

a. Metamorphic only b. Sedimentary only c. Igneous only d. All of the above

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A narrow slit is illuminated with sodium yellow light of wavelength 589 nm. If the central maximum extends to ±30.0°, how wide is the slit?

a. 0.500 mm b. 2.20 × 10^?6 m c. 3.33 × 10^?5 m d. 1.18 ?m e. 5.89 ?m

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A pair of crossed Polaroids will transmit light

A) of sufficiently long wavelengths. B) that itself is polarized. C) if a third Polaroid at about 45 degrees is inserted between the two.

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