A certain crystal has an interatomic spacing of 0.142 nm. If a beam of electrons moving with a speed of 1400 m/s is diffracted from this crystal, what is the de Broglie wavelength of the electron?
A) 420 nm
B) 130 nm
C) 260 nm
D) 502 nm
E) 520 nm
E
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A 2.15 kg lightly damped harmonic oscillator has an angular oscillation frequency of 0.261 rad/s
If the maximum displacement of 2.0 m occurs when t = 0.00 s, and the damping constant b is 0.74 kg/s what is the object's displacement when t = 4.01 s? A) 0.50 m B) 0.43 m C) 0.58 m D) 0.65 m
If a lamp has a resistance of 265 ? when it operates at 250 W, what current does it carry?
a. 1.0 A b. 0.94 A c. 0.97 A d. 1.1 A e. 1.9 A
A 328-kg car moving at 19.1 m/s in the +x direction hits from behind a second car moving at in the same direction
If the second car has a mass of and a speed of right after the collision, what is the velocity of the first car after this sudden collision? A) 18.2 m/s B) -14.0 m/s C) 24.2 m/s D) 14.0 m/s
When Cavendish claimed that he "weighed" Earth, he actually calculated the
A. force that the Moon exerts on Earth. B. weight of Earth. C. mass of Earth. D. force that the Sun exerts on Earth.