What is the approximate volume of an adult human’s head.
A. 0.1 
B. 0.001
C. 0.005
D. 0.01
E. 0.05
C. 0.005
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A transverse wave travels at 250 m/s along the z-axis. If the frequency of the periodic vibrations of the wave is 440 Hz, then what is the wavelength of the wave?
the wave is 440 Hz, then what is the wavelength of the wave? A. 21.9 cm B. 26.7 cm C. 35.7 cm D. 56.8 cm E. 73.7 cm
A _________ wave is one with its oscillations perpendicular to the direction of propagation
Fill in the blank(s) with correct word
One of the main problems with the Bohr model of the hydrogen atom when compared with the results of the methods of quantum mechanics used to describe atoms, was that the Bohr model predicted
a. the ground state angular momentum was L = 1 . b. the frequency of the radiation emitted when an electron "jumps" from one allowed orbit to another was hf = Ei ? Ef. c. the potential energy function for the hydrogen atom was given by V(r) = ?ke2/r. d. the energy of the ground state of the hydrogen atom was En = ?13.6 eV.
If the magnification produced by an optical system is negative, the image is
a. smaller than the object. b. inverted. c. upside down. d. all of the above.