A(n) ______________ is an elementary particle with a charge of +1.6 × 10^-19 C
a. electron
b. neutron
c. proton
d. atom
c
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Where are most elements heavier than hydrogen and helium made?
A) in the gas between the stars B) in the cores of stars, in supernovae, and during neutron star mergers C) All elements were made about 5 minutes after the universe began. D) in the cool atmospheres of red giant stars E) in white dwarfs
When a cold front advances under a warm front, this results in a(n)
a. stationary front. b. anticyclone. c. cold front occlusion. d. warm front occlusion.
Nonreflective coatings for camera lenses reduce the loss of light at various surfaces of multi-lens systems, as well as preventing internal reflections that might mar the image. Find the minimum thickness of a layer of magnesium fluoride (n = 1.38) on
flint glass (n = 1.66) that will cause destructive interference of reflected light of wavelength ? = 550 nm, a wavelength which is near the middle of the visual spectrum.
All of the ________ now observed must be primordial
Fill in the blank(s) with correct word