A) derive from the definition of the clectric current i = [s df - j through the arca s the dwhere dq is the charge formula for the electric current inside a conducting wire i which flows through the cross section of the wire in the time dt stationary charge distribution, 2n wire have to be equal and independent of the cross sections of the wire both ends of the b) show that for a 0, the currents on oss c) given a stationary charge distribution. derive kirchhoff's current law, which states that the sum of all inflowing currents is equal to the sum of all out flowing currents d) show that a stationary field ē in a volume v performs the power p = jyj-edv. show that p ui holds for the case of a infinitesimal thin wire. hint: p where w q fre-dr

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.

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

Refer to your lab guide and review the data in table b to complete each statement. the mass of g1 + g2 after the collision kg. the velocity of g1 + g2 after the collision m/s. the momentum of the combined gliders after the collision kg · m/s.