A certain crystal has a spacing of 0.442 nm between atoms. A beam of neutrons moving with a speed of 1640 m/s perpendicular to the surface is diffracted as it passes through the crystal

What is the angle from the central maximum to the next interference maximum? (mneutron = 1.675 × 10-27 kg, h = 6.626 × 10-34 J ? s)
A) 17.0°
B) 21.0°
C) 33.1°
D) 60.0°
E) 90.0°


C

Physics & Space Science

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Two tuning forks produce sounds of wavelengths 3.4 meters and 3.3 meters. Approximately what beat frequency is produced?

A) 0.1 hertz B) 1.0 hertz C) 2.0 hertz D) 3.0 hertz E) 4.0 hertz

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An uncharged conductor has a hollow cavity inside of it. Within this cavity there is a charge of +10 µC that does not touch the conductor. There are no other charges in the vicinity

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A straight wire that is 0.60 m long is carrying a current of 2.0 A. It is placed in a uniform magnetic field of strength 0.30 T. If the wire experiences a force of 0.18 N, what angle does the wire make with respect to the magnetic field?

A) 30° B) 60° C) 90° D) 25° E) 35°

Physics & Space Science