The ________ focus reflector needs only a single optical surface to form images
Fill in the blank(s) with correct word
prime
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Energy in the Electric Field: At a distance d from a point charge Q, the energy density in its electric field is u. If we now go to a distance d/2 from the charge, what is the energy density at the new location?
A. 16u
B. 8u
C. 4u
D. 2u
E. u
Most of the energy of the supernova is carried outward via a flood of:
A) gamma rays. B) helium nuclei. C) protons. D) neutrinos. E) positrons.
Identify a true statement about carbonaceous chondrites
A) They contain significant amounts of hydrogen. B) They have not changed since they formed. C) They are mostly composed of nonvolatile compounds. D) They do not provide information about the early Solar System.
A baseball has a mass of 0.15 kg. If pitched at 40.0 m/s with a relative uncertainty of 1%, how uncertain is its position?
A. 9.1 x 10-34m B. 5.7 x 10-34m C. 1.8 x 10-34m D. 6.3 x 10-33m