Middle C has a frequency of 262. Hz. What is the frequency of C an octave higher?
A) 2.10 kHz
B) 786. Hz
C) 0.524 kHz
D) 270. Hz
E) 2.62 kHz
C
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Far-ultraviolet rays have short wavelengths, low energies, and travel at the speed of sound
a. True b. False Indicate whether the statement is true or false
The 1 560 kg solid steel door to a bank vault is 2.00 m high, 1.00 m wide and 10 cm thick. One hinge is 60.0 cm down from the top on the left hand side of the door. The other hinge is 30.0 cm up from the bottom. What horizontal force, in what direction, does the door exert on the lower hinge?
a. 6 950 N, left b. 6 950 N, right c. 7 640 N, left d. 7 640 N, right e. 15 300 N, left
In Ptolemy's geocentric model, retrograde motion occurs when the planet is closest to us, on the inside portion of the
A) ellipse. B) epicycle. C) equant. D) ecliptic. E) deferent.
The index of refraction for a certain material is 1.399 for red light and 1.432 for blue light. Find the angle separating the two refracted colors if the:
(a) angle of incidence is 30°. (b) angle of incidence is 60°.