Which of these is emitted when an electron falls from a higher to lower orbital?
A) a photon
B) a positron
C) a neutrino
D) a graviton
E) another electron
A
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What does it mean for something to be "quantized?"
a. It can have only certain discrete values. b. It can have only integer values. c. It can have values only between certain limits. d. none of the above
A 12000-N car is raised using a hydraulic lift, which consists of a U-tube with arms of unequal areas, filled with oil and capped at both ends with tight-fitting pistons
The wider arm of the U-tube has a radius of 18.0 cm and the narrower arm has a radius of 5.00 cm. The car rests on the piston on the wider arm of the U-tube. The pistons are initially at the same level. What is the initial force that must be applied to the smaller piston in order to start lifting the car? For purposes of this problem, neglect the weight of the pistons. A) 727 N B) 926 N C) 2900 N D) 3330 N E) 1.20 kN
The graphs below represent current and voltage phasors at one instant of time. The solid arrows represent the voltage phasors, ?Vmax, and the dashed arrows represent the current phasors, Imax. Which graph shows the correct relationship between current and voltage phasors for a capacitor in an RC circuit?
a.
b.
c.
Two cyclists of different mass take a turn on a level road. They follow the same path and are moving the same constant speed for the turn. Which of the following statements is correct?
A. The acceleration is larger for the more massive cyclist B. The acceleration is not zero but is the same for both C. The acceleration is zero for both D. The acceleration is larger for the less massive cyclist