Which of the following is an "exchange particle" for the electroweak force?
A) the photon
B) the Z particle
C) Both of the above.
D) the W+ and W-
E) All of the above.
E
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If we had never discovered quantum mechanics, which of the following would be true?
A) We would not have electronic devices such as cell phones and laptops. B) The physical world would behave much differently. C) Nothing would be different because quantum mechanics has not led to any changes in the lives of people. D) The Sun would not shine.
Which of the following do the atoms 14N and 15N have in common?
A) total number of neutrons and electrons B) number of protons C) total number of protons and neutrons D) number of neutrons
Resonance in a series RLC circuit occurs when
A) XL is greater than XC. B) XC is greater than XL. C) (XL - XC) is equal to R2. D) (XL - XC)2 is equal to R2. E) XC equals XL.
A point charge Q is placed on the x axis at the origin. An identical point charge is placed on the x axis at x = ?1.0 m and another at x = +1.0 m. If Q = 40 ?C, what is the magnitude of the electrostatic force on the charge at x = +1.0 m?
a. 29 N b. 14 N c. 11 N d. 18 N e. 7.0 N