Pianos are usually strung with multiple identical wires sounding each note. If two wires that each are meant to have a fundamental frequency of 283.5 Hz are played, and a beat frequency of 1.5 Hz is heard, by what fraction must the string which is lower in frequency than the other have its tension adjusted?
A. 0.27%
B. 0.53%
C. Impossible to determine
D. 1.1%
C. Impossible to determine
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What can you conclude from studying this graph?
A) Potassium-40 has a half-life of 1.25 billion years. B) Argon-40 has a half-life of 1.25 billion years. C) Both potassium-40 and argon-40 have half-lives of 1.25 billion years. D) It takes 5 billion years to turn potassium-40 into argon-40.
Why do instruments that are looking for transiting planets need to look for very small brightness changes?
What will be an ideal response?
The center of mass for Earth orbiting the Sun lies inside the Sun
Indicate whether the statement is true or false
As an object moves from point A to point B only two forces act on it: one force is conservative and does ?70 J of work, the other force is nonconservative and does +50 J of work. Between A and B,
a. the kinetic energy of object increases, mechanical energy increases. b. the kinetic energy of object decreases, mechanical energy increases. c. the kinetic energy of object decreases, mechanical energy decreases. d. the kinetic energy of object increases, mechanical energy decreases. e. None of the above.