An electric field of magnitude 5.25 x 10' n/c points due south at a certain location. find the magnitude and direction of the force on 3-5.85 c charge at this location. magnitude in direction -selech four point charges are located at the corners of a square. each charge has magnitude 3.10 nc and the square has sides of length 2.10 cm. find the magnitude of the electric field in n/c) at the center of the square if all of the charges are positive and three of the charges are positive and one is negative. hint (a) all the charges are positive nc (b) three of the charges are positive and one is negative n/c

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.

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

A2000 kg car is rounding a curve of radius 200 m on a level road. the maximum frictional force the road can exert on the tires of the car is 4000 n. what is the highest speed at which the car can round the curve?