A pipe is 0.90 m long and is open at one end but closed at the other end. If it resonates with a tone whose wavelength is 0.72 m, what is the wavelength of the next higher overtone in this pipe?
A) 0.36 m
B) 0.40 m
C) 0.45 m
D) 0.51 m
E) 0.58 m
Answer: D
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Which of the following statements about thermal radiation is always true?
A) A hot object emits more radiation per unit surface area than a cool object. B) A cold object produces more total infrared and radio emission per unit surface area than a hot object. C) A hot object produces more total infrared emission than a cooler object. D) All the light emitted by hot object has higher energy than the light emitted by a cooler object.
Estimate the number of times an average person's heart beats in a lifetime. Assume the average heart rate is and a life span of 75 years
A) 3 × 109 beats B) 3 × 108 beats C) 3 × 1010 beats D) 3 × 107 beats
Series/Parallel Circuits: A portion of a circuit is shown in the figure, and the batteries are ideal. What is the potential difference VA - VB if I = 5.0 A?
A. 63 V B. 35 V C. 55 V D. 45 V E. 71 V
The largest known black holes:
A) create the dark nebulae in the plane of the Milky Way. B) can be no more than 1.4 solar masses, according to Chandrasekhar. C) lie in the cores of the most massive galaxies. D) can be no bigger than a small city, just like neutron stars. E) can be no bigger than the Earth, like white dwarfs.