When you stand in front of a convex mirror, the image you see is
a. real and inverted.
b. real and upright.
c. virtual and inverted.
d. virtual and upright.
e. real and inverted if your distance from the mirror is greater than two focal lengths.
d
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Which of the following objects would be found on the Moon's surface?
A) sedimentary rocks B) meteoroids C) meteors D) meteorites E) asteroids
A watt is one ______________ per second
Fill in the blank(s) with correct word
A 7.5 × 1014 Hz laser emits a 7.7-?s pulse, 5.0 mm in diameter, with a beam energy density of 0.51 J/m3. What is the amplitude of the electric field of the emitted waves?
(c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T • m/A, ?0 = 8.85 × 10-12 C2/N • m2) A) 340 kV/m B) 480 kV/m C) 240 kV/m D) 150 kV/m E) 120 kV/m
Which of the following statements is not a prediction of the general theory of relativity?
A) Time runs slightly slower on the surface of the Sun than on the surface of Earth. B) The Universe has no boundaries and no center. C) The curvature of spacetime can distort the appearance of distant objects. D) Different observers can disagree about the fundamental structure of spacetime. E) A binary star system with two stars orbiting each other rapidly emits gravitational waves.