A spherical volume of space has an electric field of intensity 130 N/C directed radially outward from it surface of radius 0.4 m. What is the net charge enclosed within this surface? (?0 = 8.85 × 10^–12 F/m)
a. 3.5 nC
b. 2.3 nC
c. –3.5 nC
d. –2.3 nC
e. 0 nC
b
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A solar mass star will evolve off the main sequence when
A) it completely runs out of hydrogen. B) it expels a planetary nebula to cool off and release radiation. C) it explodes as a violent nova. D) it builds up a core of inert helium. E) it loses all its neutrinos, so fusion must cease.
Comparing the light from a glowing tube of neon gas and the beam of a helium-neon laser, there is a greater number of spectral lines in light from the
A) neon gas tube. B) laser beam. C) both about the same
Violet light (? = 430 nm) is incident on a piece of potassium (? = 2.20 eV). What is the maximum kinetic energy of the ejected photoelectrons? (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, 1 eV = 1.60 × 10^?19 J, and 1 nm = 10?9 m)
a. 2.43 eV b. 0.69 eV c. 2.89 eV d. 5.09 eV e. 0.96 eV
The ____________________ Tables were based on a heliocentric model of the universe and used elliptical orbits for the planets
Fill in the blank(s) with correct word