The energy required to ionize a hydrogen atom from the ground state is
A) 27.2 eV.
B) 13.6 eV.
C) 6.8 eV.
D) 3.4 eV.
E) infinite.
B
Physics & Space Science
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If you are measuring the mass of an elephant, the most appropriate SI unit is the
A) megagram. B) kilogram. C) gram. D) milligram. E) microgram.
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In a Young's double-slit interference apparatus, by what factor is the distance between adjacent light and dark fringes changed when the wavelength of the source is doubled?
a. 1/4 b. 1/2 c. 1 d. 2 e. 4
Physics & Space Science
True or False: A photon is reflected from a mirror. Although the photon carries momentum, its change in momentum is zero when it reflects from the mirror, so it can't exert a force on the mirror
1.True 2.False
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Determine the potential difference Va ? Vb shown in the circuit below
a.
?5.0 V
b.
+5.0 V
c.
?10 V
d.
+10 V
e.
0 V
Physics & Space Science