In its lowest quantum state, a diatomic quantum mechanical rotator has a rotational energy of
A)
zero.
B)
2h/?I.
C)
h/2?I.
D)
h/?I.
E)
none of the given answers
A
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A flatbed truck is carrying an 800-kg load of timber that is not tied down. The maximum friction force that the truck bed exerts on the load is 2400 N. What is the greatest acceleration that the truck can have without losing its load?
What will be an ideal response?
Increasing the separation of the two charged parallel plates of a capacitor, which are disconnected from a battery, will produce what effect on the capacitor?
a. increase charge b. decrease charge c. increase capacitance d. decrease capacitance
Energy transfer by convection is primarily restricted to
A) solids. B) liquids. C) gases. D) fluids. E) none of the above
How do astronomers create three-dimensional maps of the universe?
A) through comparison of computer models of the structure formation with observations B) by measuring the sky positions and redshifts of many galaxies C) by measuring the sky positions and apparent brightnesses of many galaxies D) by measuring the colors and luminosities of many galaxies E) by carefully measuring the parallax of many galaxies