A lens of focal length f is used to project an image of a solar eclipse on a flat sheet of paper. Which of the following image distances gives the clearest image in this case?
A. f/2
B. f
C. 2f
D. more than 10f
E. less than f/10
B. f
Physics & Space Science
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One of the unusual features of the Earth's moon is that it is
A) very large B) very small C) made mostly of rock D) keeps one side facing the Earth
Physics & Space Science
LCMs of ABS have mers of PAN, BR, and PS on one polymer chain, resulting in a(n) _________.
Fill in the blank(s) with the appropriate word(s).
Physics & Space Science
The Bohr theory does not predict that
a. hydrogen atoms will give off the lines from the Balmer series. b. the ground state of hydrogen is spherically symmetric. c. it requires 13.6 eV to ionize hydrogen. d. the approximate radius of a hydrogen atom is 5.3 × 10^?11 m.
Physics & Space Science
From Earth, the center of the Milky Way lies in the direction of the constellation Cygnus
Indicate whether the statement is true or false
Physics & Space Science