The strings in musical instruments that have greater mass tend to produce notes of

A) higher frequency.
B) lower frequency.
C) the same frequency.
D) none of the above


Answer: B

Physics & Space Science

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A diatomic molecule has 2.6 × 10-5 eV of rotational energy in the l = 2 quantum state. What is its rotational energy in the l = 1 quantum state?

A) 7.8 µeV B) 8.7 µeV C) 5.3 µeV D) 4.1 µeV E) 3.4 µeV

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According to the law of reflection, a light ray striking a mirror at an angle of incidence of 30 degrees will leaves the mirror at an angle of

a. 60 degrees b. 30 degrees c. less than 30 degrees d. none of the above

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Stars originate as large bodies of slowly rotating gas. Because of gravity, these clumps of gas slowly decrease in size. The angular velocity of a star increases as it shrinks because of

a. conservation of angular momentum b. conservation of linear momentum c. conservation of energy d. the law of universal gravitation e. conservation of mass

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A laser produces a beam of 4000-nm light. A shutter allows a pulse of light, 30 ps in duration, to pass through

What is the uncertainty in the energy of a photon in the pulse? (1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s) A) 2 ×10-5 eV B) 2 ×10-6 eV C) 2 ×10-4 eV D) 2 ×10-3 eV E) 2 ×10-2 eV

Physics & Space Science