Apressure change along the direction of flow can cause the velocity profile to be non-linear. consider the moving plate below, where u=0.24m/s and d=10mm. the fluid between the plate and the fixed surface is water, which is newtonian and has a viscosity of μ = 8.97×10−4 n⋅s/m2 at the temperature of the system. the velocity profile for this case is u=(32y−800y2)m/su=(32y−800y2)m/s, where y is in meters. what is the shear stress acting on the moving plate?

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

A23 kg log of wood begins from rest, 300 m up a sluice (a water track used to transport logs, think of it as an inclined plane with negligible friction) inclined at 20° to the horizontal. after it reaches the flat waterway at the bottom it collides elastically with a 100 kg block of wood initially at rest near the base of the incline. (a) how long does it take the 23 kg log to travel down the incline? (b) what is the speed of the 23 kg log at the bottom of the incline? (c) what are the velocities of both blocks of wood after the collision? (d) what is the total kinetic energy before the collision? (e) what is the kinetic energy of the 23 kg log after the collision? (f) what is the kinetic energy of the 100 kg block of wood after the collision? (g) what is the total kinetic energy after the collision? (h) compare the total initial and total final kinetic energies. is this consistent with what you would expect for elastic collisions? explain!

Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers distance