The planetary model of the atom is associated with
a. Bohr.
b. Thomson.
c. Dalton.
d. Rutherford.
a
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An electrical motor spins at a constant If the rotor radius is what is the linear acceleration of the edge of the rotor?
A) 572,400 m/s2 B) 5707 m/s2 C) 281.6 m/s2 D) 28.20 m/s2
A 2.0-?F capacitor is charged to 12 V and then discharged through a 4.0 × 106 ? resistor. How long will it take for the voltage across the capacitor to drop to 3.0 V?
A) 4.5 s B) 8.0 s C) 11 s D) 22 s E) 24 s
Treating water with chlorine or ozone during water purification is an example of
A) a physical change. B) a chemical reaction. C) ion exchange. D) a solid dissolving in a liquid. E) only a and b
How many electrons are necessary to produce 1.0 C of negative charge? (e = 1.60 × 10-19 C)
A) 1.6 × 109 B) 6.0 × 1023 C) 6.3 × 1018 D) 6.3 × 109 E) 1.6 × 1019