Consider the waves on a vibrating guitar string and the sound waves the guitar produces in the surrounding air. The string waves and the sound waves must have the same
A) wavelength.
B) velocity.
C) frequency.
D) amplitude.
E) More than one of the above is true.
Answer: C
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A diatomic has a moment of inertia of 7.73 × 10-45 kg? m2. What is its rotational energy in the quantum state characterized by l = 2? (h = 6.626 × 10-34 J ? s, h = 1.055 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J)
A) 87.1 µeV B) 27.0 µeV C) 72.2 µeV D) 587 µeV E) 22.7 µeV
An hour of right ascension corresponds to 60 degrees in the sky
Indicate whether the statement is true or false
Weight and g: A spherically symmetric planet has four times the earth's mass and twice its radius. If a jar of peanut butter weighs 12 N on the surface of the Earth, how much would it weigh on the surface of this planet?
A. 3.0 N B. 6.0 N C. 12 N D. 24 N E. 36 N
The focal length of the lens of a simple digital camera is 40 mm, and it is originally focused on a person 25 m away. In what direction must the lens be moved to change the focus of the camera to a person 4.0 m away?
A) It does not make any difference. B) sideways from the CCD sensors C) away from the CCD sensors D) towards the CCD sensors