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A short, thick, cold wire is the best conductor. A shorter wire will allow electricity to move through at a higher rate than a longer wire. How well a material conducts current is an internal factor affecting resistance. If you double the length of a wire, you cut the resistance in half. If you double the thickness of a wire, you cut the resistance in half. Superconductors have no measurable resistance. The higher the temperature of the conductor, the lower the resistance. The resistance in a wire with less thickness is less. Thickness, length, and temperature are internal factors that affect resistance. When a light is first switched on, the light bulb's filament has a lower resistance than after it gives off light for awhile.
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Write the equation for momentum, first using symbols for the variables, then using words for the variables.

The particle in a two-dimensional well is a useful model for the motion of electrons around the indole ring (3), the conjugated cycle found in the side chain of tryptophan. we may regard indole as a rectangle with sides of length 280 pm and 450 pm, with 10 electrons in the conjugated p system. as in case study 9.1, we assume that in the ground state of the molecule each quantized level is occupied by two electrons. (a) calculate the energy of an electron in the highest occupied level. (b) calculate the frequency of radiation that can induce a transition between the highest occupied and lowest unoccupied levels. 9.27 electrons around the porphine ring (4), the conjugated macrocycle that forms the structural basis of the heme group and the chlorophylls. we may treat the group as a circular ring of radius 440 pm, with 20 electrons in the conjugated system moving along the perimeter of the ring. as in exercise 9.26, assume that in the ground state of the molecule quantized each level is occupied by two electrons. (a) calculate the energy and angular momentum of an electron in the highest occupied level. (b) calculate the frequency of radiation that can induce a transition between the highest occupied and lowest unoccupied levels.

Can you receive a shock severe enough to prevent you from releasing the wire from an ordinary outlet with dry hands? a. no b. yes explain