Athin ball shell is shaped like a hollow ball with a radius of 42.8 cm. the material is a conductor with charge 0.8 nc a point charge of -5.4 nc is placed in the center of the ball. how many n / c is the electric field just outside the ball? remember positive is outwards i did this: got total charge qencloced = -4.6*10^-9 c found the field e=(qencloced/epsilon) divided by 4*pi*speed squared got 225.80 n/c. the answer in my (really annoying online test) is 265 n/c
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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.
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Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)
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Athin ball shell is shaped like a hollow ball with a radius of 42.8 cm. the material is a conductor...
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