Which form of radiation is not suitable for determining the elastic strain in a crystalline material using diffraction?
(a) X-rays
(b) Visible light
(c) Electrons
(d) Neutrons
(b) Visible light
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Significant Figures: In a parallel universe, the quantity ? has the value 3.14049… . Express ? in that universe to(a) four significant figures(b) five significant figures.
Fill in the blank(s) with the appropriate word(s).
Why have more people seen a lunar eclipse than an solar eclipse?
a. Eclipses of the Sun are much rarer than eclipses of the Moon. b. The shadow of the Moon is larger than the shadow of Earth. c. Anyone on the night side of Earth can see a total eclipse of the Moon. d. Anyone on the day side of Earth can see a total solar eclipse.
The space time diagram in figure R2.12 shows the world lines of various objects. Which object has the largest speed at time t = 4 s?
A. A
B. B
C. C
D. D
E. E
Briefly describe how Hubble classified the galaxies visually
What will be an ideal response?