The speed of light in any transparent medium is the same as the speed of light in a vacuum
a. True
b. False
Indicate whether the statement is true or false
False
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What statistic below has changed the most in the last decade?
A) the compositions of moons of Uranus B) the number of known Jovian moons C) the rotational period of the Jovian moons D) the masses of the Galilean moons E) the densities of the larger moons
A solid conducting sphere of 10-cm radius has a net charge of 18 nC. If the potential at infinity is taken as zero, what is the potential at the center of the sphere?
a. 2.1 ?V b. 16 ?V c. 1.6 × 10^3 V d. >1.6 × 10^4 V e. 13 ?V
Dark lines in an absorption spectrum represent:
a) particular energies of light coming from a distant object that areabsorbed by materialin between. b) flaws in the telescopes and spectroscopes that astronomers use to measure spectra. c) hotter regions in the object that is emitting the spectrum. d) regions where light travels more slowly and is not able to reach us. e) photons emitted when an electron jumps from a higher to a lower energy level.
A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its kinetic energy is a minimum?
A) midway between A or B B) at either A or B C) one-fourth of the way between A and B