Elements heavier than hydrogen and helium constitute about ________ of the mass of the Milky Way's interstellar medium.
A) 0.002 %
B) 2 %
C) 70 %
D) 98%
B) 2 %
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The in-plane shear strength of a uniaxial composite material is approximately _________the magnitude of the transverse tensile strength.
Fill in the blank(s) with the appropriate word(s).
Index of Refraction: The index of refraction of a certain glass is measured to be 1.5. What is the speed of light in that glass? (c = 3.0 × 108 m/s)
A. 1.0 × 108 m/s B. 2.0 × 108 m/s C. 3.0 × 108 m/s D. 4.0 × 108 m/s E. 5.0 × 108 m/s
Albert Einstein received the 1921 Nobel Prize for his
A) Special Theory of Relativity. B) General Theory of Relativity. C) Theory of the Photoelectric Effect. D) Theory of the Brownian Motion.
The angular size of an object depends on which two quantities?
A) The object's actual size and its mass B) The object's distance from us and its brightness C) The object's actual size and its distance from us D) The object's brightness and its mass