Anumber of ms contacts are formed on si substrates maintained at t = 300k. for each of the contacts listed below, draw the energy-band diagram (indicating the schottky-barrier height , the depletion layer width w, e ef in the neutral region, and the built-in potential vi), and indicate whether the contact is ohmic or rectifying: a) an ideal contact between al (in-4. i ev) and n-type silicon with nd-1017cm', v,-0 v. b) an ideal contact between al (m-4.1ev) and p-type silicon with na10cm, va-0 v c) an ideal contact between al (ф,-41 ev) and p-type silicon with n,-1017cm-3, .5 v d) a contact between nisi and n-type silicon with nd-1017cm1-3, with v,-0 v e) a contact between nisi and p-type silicon with na- 10"cm3, with va-0 v

In a wind tunnel the speed changes as the cross sectional area of the tunnel changes. if the speed in a 6' x 6' square test section is 100 mph, what was the speed upstream of the test section where the tunnel measured 20' x 20'? use conservation of mass and assume incompressible flow. conservation of mass requires that as the flow moves through a path or a duct the product of the density, velocity and cross sectional area must remain constant; i.e., that ova-constant. a model is being tested in a wind tunnel at a speed of 100 mph if the flow in the test section is at sea level standard conditions, what is the pressure at the model's stagnation point? (a) the tunnel speed is being measured by a pitot-static tube connected to a u- tube manometer. what is the reading on that manometer in inches of water? (b) at one point on the model a pressure of 2058 psf is measured. what is the local airspeed at that point?

The roller coaster from problem #1 then tops a second hill at 15.0 m/s, how high is the second hill? 91.5 m 79.2 m 80.0 m 68.5 m

Which situation will have the highest resistance? a.long wire and high temperatureb.short wire and high temperaturec.long wire and cold temperaturedshort wire and low temperature