In an x-ray tube, high-speed electrons are slammed into a lead target, giving off x-rays. If the electrons are accelerated from rest through a potential difference of 160 000 volts, what speed do they have when they strike the target? (qe = 1.6 × 10^?19 C, me = 9.11 × 10^?31 kg, and c = 3.00 × 10^8 m/s)
a. 0.79c
b. 0.65c
c. 0.83c
d. 0.49c
e. 0.48c
b
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Which of the following elements has the most mass?
A) hydrogen B) iron C) lead D) uranium E) all have the same mass
What is the quantum number n of a particle of mass m confined to a one-dimensional box of length L when its momentum is 4h/L?
a. 1 b. 4 c. 2 d. 8 e. 16
The Kuiper Belt objects have orbits that
A) carry them thousands of AU beyond the Sun. B) stay out just beyond Neptune and close to the ecliptic. C) stay sixty degrees ahead of or behind Jupiter. D) cross the orbit of Mars at perihelion. E) cross the orbit of Earth at perihelion.
Conversion of Units: The following conversion equivalents are given:1.0 m = 100 cm 1.0 in = 2.54 cm 1.0 ft = 12 inIf a bin has a volume of 1.5 m3, the volume of the bin, in ft3, is closest to
A. 35 ft3. B. 41 ft3. C. 47 ft3. D. 53 ft3. E. 59 ft3.