If the measured momentum of an electron is 3.20 × 10^-27 kg×m/s with an uncertainty of 4.8 × 10^-28 kg×m/s, what is the minimum uncertainty in the position? (h = 6.63 × 10^-34 J×s)
a. 0.63 × 10^-4 m
c. 3.3 × 10^-6 m
b. 2.2 × 10^-7 m
d. 1.1 × 10^-7 m
D
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What wavelength monochromatic source in the visible region (390 to 710 nm) can be used to constructively reflect off a soap film (n = 1.46) in air if the film is 288 nm thick?
a. 561 nm c. 587 nm b. 480 nm d. 467 nm
The purpose of using epicycles and deferents to explain the motion of the planets in the night sky was to account for
a. prograde motion. b. Mercury's and Venus's limited angular distance from the Sun. c. retrograde motion. d. non-uniform speed of the planets in their orbits. e. precession of the equinoxes.
Eighteen days past new moon, the Moon's phase is waning gibbous
Indicate whether the statement is true or false
In another solar system, a planet has a moon that is 4.0 × 105 m in diameter. Measurements reveal that this moon takes 3.0 x 105 s to make each orbit of diameter 1.8 × 108 m. What is the mass of the planet? (G = 6.67 × 10-11 N ? m2/kg2)
A) 1.2 × 1024 kg B) 1.7 × 1024 kg C) 2.4 × 1024 kg D) 3.4 × 1024 kg E) 4.8 × 1024 kg