Which of the following were found from Millikan's oil drop experiment?
a. the weight, and hence the mass, of the electron
b. all of the above
c. that quarks have charges that are fractions of the electronic charge
d. the value of the electron's quantized charge
D
You might also like to view...
The discovery of a supernova by Tycho Brahe in 1572 contradicted the commonly held belief that the universe was
A) unchanging B) spherical C) infinite D) perfect
A current carrying loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense
(a) For points OUTSIDE the loop, the magnetic field caused by this current A) circles the loop in a clockwise direction. B) circles the loop in a counterclockwise direction. C) points straight up. D) points straight down. E) is zero. (b) For points INSIDE the loop, the magnetic field caused by this current A) circles the loop in a clockwise direction. B) circles the loop in a counterclockwise direction. C) points straight up. D) points straight down. E) is zero.
For a specific element, photons of how many different energies could be emitted by electrons in the n = 3 level as they return to the n = 1 level?
a. 1 b. 4 c. 2 d. 3
A 1000-kg helicopter hovers over a forest fire and starts to squirt water downward with a speed of 10 m/s at a rate of 40 kg/s. What is the initial upward acceleration on the helicopter when it first starts to release the water?
A) 2.5 m/s2 B) 0.40 m/s2 C) 0.25 m/s2 D) 4.0 m/s2 E) 5.0 m/s2