Compare the quantum mechanics model of the atom to the Bohr model of the atom.
A. quantum mechanics considers the wave behavior of the electron while the Bohr model considers the particle nature of the electron
B. as long as electrons remain in its orbit it emits no radiation.
C. the location of the particle is known in the Bohr model.In the quantum mechanics model, the electrons position is defined in probability terms.
D. The Bohr model could not be used for larger atoms.
E. all of the above statements are valid
Ans: E. all of the above statements are valid
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When a ferromagnetic material that has been magnetized is brought to a temperature greater than the Curie temperature, what happens to its residual magnetism
a. Nothing happens to the residual magnetism. b. The residual magnetism disappears. c. The residual magnetism reaches it's highest value. d. All the magnetic domains causing magnetism become a single domain. e. The material of the magnet melts causing currents that are magnetic.
A 120-V rms signal at 60 Hz is applied across a series combination of a 30-mH inductor and a 100-? resistor. What is the rms value of the current in this circuit?
A) 1.2 A B) 1.8 A C) 0.80 A D) 1.6 A E) 1.4 A
The pulsation in the luminosity of variable stars is driven by the changing opacity of their atmosphere.
Answer the following statement true (T) or false (F)
The number of _______________ visible on the Sun varies in a cycle with a period of 11 years
Fill in the blank(s) with correct word