What do astronomers typically refer to as "heavy elements"?
A) elements that are heavier than iron
B) elements that are heavier than carbon
C) elements that are heavier than uranium
D) elements besides hydrogen and helium
D) elements besides hydrogen and helium
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Compound Microscope: You have a choice between two lenses of focal lengths fa and fb, where fb = 2fa, to use as the objective lens in building a compound microscope. If the magnification you obtain using lens a is Ma, what will be the magnification when using lens b?
A. Mb = 2 Ma B. Mb = 4 Ma C. Mb = 8 Ma D. Mb = Ma/4 E. Mb = Ma/2
The mass range for neutron stars is:
A) .08 to .4 solar masses. B) .4 to 3 solar masses. C) 1.4 to 3 solar masses. D) 3 to 8 solar masses. E) 6 to 11 solar masses.
Methane gas absorbs the color ________, accounting for the colors of Uranus and Neptune
Fill in the blank(s) with correct word
An object is placed 5 cm to the left of a converging spherical lens. The lens has a focal length of f = 10 cm. What kind of image is formed and what is its orientation?
a. Real/Upright b. Virtual/Upright c. Virtual/Inverted d. Real/Inverted