If a proton and an electron have the same speed, which one has the longer de Broglie wavelength?
A) the electron
B) the proton
C) It is the same for both of them.
A
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Consider the x-axis with 4.0 ?C at x = 1.0 meter and -2.0 ?C at the origin. Where should 6.0 ?C be placed so that the net force on it is zero?
What will be an ideal response?
A narrow copper wire of length L and radius b is attached to a wide copper wire of length L and radius 2b, forming one long wire of length 2L. This long wire is attached to a battery, and a current is flowing through it
If the electric field in the narrow wire is E, the electric field in the wide wire is A) E. B) 2E. C) 4E. D) E/2. E) E/4.
O2 is an example of
A) a molecule only B) a compound only C) both a molecule and a compound D) a collection of isolated atoms
Current observations indicate that the amount of baryonic matter and dark matter in the Universe
a. is sufficient great enough to overcome the expansion of the Universe. b. implies that the Universe is closed. c. is mostly in the form of black holes and quasars. d. are roughly equal. e. implies that the Universe is open.