Using the following generic atom description, choose the correct method for determining the number of neutrons
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A) subtract G from F
B) subtract F from G
C) add F and G
D) divide F by G
E) look it up on the periodic table
Answer: A
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Energy in Capacitors: Two parallel plates that are initially uncharged are separated by 1.7 mm, have only air between them, and each have surface areas of 16 cm2. How much charge must be transferred from one plate to the other if 1.9 J of energy are to be stored in the plates? (?0 = 8.85 × 10-12 C2/N ? m2)
A. 5.6 ?C B. 4.0 ?C C. 8.0 ?C D. 0.60 mC
At an instant when a particle of mass 80 g has a velocity of 25 m/s in the positive y direction, a 75-g particle has a velocity of 20 m/s in the positive x direction. What is the speed of the center of mass of this two-particle system at this instant?
a. 16 m/s b. 45 m/s c. 23 m/s d. 20 m/s e. 36 m/s
How does a lenticular galaxy differ from a spiral galaxy?
A) It has no bulge. B) It has an elongated bulge resembling a bar more than a sphere. C) It is flatter in shape. D) It has no gas or dust. E) It has no spiral arms.
Assume that a uniform magnetic field is directed into this page. If a proton is released with an initial velocity directed from the bottom edge to the top edge of the page, which of the following describes the direction of the resultant force acting on the proton?
a. into the page c. to the right b. to the left d. out of the page