A certain fuse "blows" if the current in it exceeds 1.0 A, at which instant the fuse melts with a current density of 620 A/cm2. What is the diameter of the wire in the fuse?
A) 0.45 mm
B) 0.63 mm
C) 0.68 mm
D) 0.91 mm
A
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A 3.0-?F capacitor charged to 40 V and a 5.0-?F capacitor charged to 18 V are connected to each other, with the positive plate of each connected to the negative plate of the other. What is the final charge on the 3.0-?F capacitor?
A. 11 ?C B. 15 ?C C. 19 ?C D. 26 ?C E. 79 ?C
How many valence electrons does gallium (Ga, atomic no. = 31) have?
A) 1 B) 6 C) 3 D) 31 E) 70
Classically, the concept of "tunneling" is impossible. Why?
a. The kinetic energy of the particle would be negative. b. The velocity of the particle would be negative. c. The total energy of a particle is equal to the kinetic and potential energies. d. The kinetic energy must be equal to the potential energy. e. The total energy for the particle would be negative.
The collective name for neutrons and protons is ______________
Fill in the blank(s) with correct word