Consider an n-type semiconductor with N_D = 10^{15} cm^{-3}NDâ=1015cmâ3. There is a uniform applied electric field, E = 10^5 \: V/cmE=105V/cm, throughout the semiconductor. At t = 0t=0, the semiconductor was illuminated by a sharply focused pulse of laser to create an excess hole concentration of \Delta p(t=0) = 10^{12} cm^{-3}Îp(t=0)=1012cmâ3 at x = 0x=0.Find the expression for the excess hole concentration, \Delta p(x, t)Îp(x, t), as a function of xx and tt for t > 0t>0, i. e. after the laser pulse is gone. Write your expression in terms of applied electric field, EE, generation rate GG, minority carrier lifetime, \tauÏ, diffusion coefficient, DD and mobility, \muμ. Subscript p can be omitted for simplicity.

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

An isolated conducting spherical shell carries a positive charge. part a which statement (or statements) about the electric field and the electric potential inside and outside the spherical shell is correct? which statement (or statements) about the electric field and the electric potential inside and outside the spherical shell is correct? electric potential inside the shell is constant and outside the shell is changing as 1/r2 both the electric potential and the electric field does change with r inside and outside the spherical shell electric potential inside and outside the shell is constant, but not zero electric potential inside the shell is constant and outside the shell is equal to zero electric field inside and outside the shell is constant (does not change with the position r), but is not equal to zero electric field inside and outside the shell is changing as 1/r (where r is the distance from the center of the sphere) electric field inside is equal to zero and outside the shell is constant, but not zero electric potential inside the shell is constant and outside the shell is changing as 1/r electric field inside and outside the shell is changing as 1/r2 electric field inside is equal to zero and outside the shell is changing as 1/r2 electric field inside and outside the shell is zero electric field inside is constant and outside the shell is changing as 1/r

Assume this car is driven off a cliff . how many arrows of force need to be drawn in the free body diagram? assume no air resistance -five -one -three -four