A guitar string has a tension of 95 N on it and is 75 cm long. If its mass is 0.27 g, what is the frequency of the first harmonic above the fundamental?
A. 685 Hz
B. 69 Hz
C. 217 Hz
D. 470 kHz
A. 685 Hz
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The spherical gaussian surfaces shown below surround the same total charge 
Through which sphere is the total electric flux larger?
A. The smaller sphere. B. The larger sphere. C. The flux through both spheres is the same. D. One cannot determine the relative fluxes from the information that we are given.
Consider a series circuit in which the capacitive reactance equals the inductive reactance. What is the phase angle between current and voltage?
A) +180.° B) +90.° C) -180.° D) -90.° E) 0.°
According to quantum physics, measuring the temperature of lava from a distant volcano by photographing its color with a telescopic camera measurably affects the lava's temperature
A) True B) False C) both of these depending on circumstances
Of the thousands of different isotopes known to exist,
a. most of them are radioactive. b. only a couple can be used to build an atom bomb. c. some are used in medical diagnosis and treatment. d. most occur naturally. e. all of the above