Velocity gradient.
iii. Define impedance and state its SI unit.
iv. What is the shape of the wave front at a point far away f
v. What are quasi static processes?
Answers
Explanation:
1- The difference in velocity between adjacent layers of the fluid is known as a velocity gradient and is given by v/x, where v is the velocity difference and x is the distance between the layers.
2- In electrical engineering, electrical impedance is the measure of the opposition that a circuit presents to a current when a voltage is applied. ... Impedance is a complex number, with the same units as resistance, for which the SI unit is the ohm (Ω).
3- For a point far away from the source of the light wavefront is planar in shape as rays are parallel to each other.
4- Reversible and quasi-static process:
If a process is carried out in such a way that at any time the system departs only infinitesimally from the equilibrium state it is called a quasi-static process.