Solid State Physics Answers

In MOSFET at strong inversion electrons confined to triangular quantum well, electrons occupy only 1 or 2 lowest subbands.
and the Van Dort model gives the quantum mechanical intrinsic carrier density in inversion channel via increased energy band-gap(ΔE).
N(QM) = N(CL) × Exp(-ΔE/2kt) this carrier amount is very high.
But density of states for inversion charges in subbads reduced from the higher 3-D density to the lower 2-D density.

Then still HOW the above Van Dort's formula giving that high amount of charge..?

A Ferris wheel of radius 6 m rotates once in
26 s.
What is its angular velocity?
Answer in units of rad/s.

A morning fog generally vanishes before noon.Explain its answer with mathematical calculation. If it has calculation.

Drawing stress versus strain curves explain the difference between ductile and brittle materials.
Give one example of each

The young's modulus for steal is 2*10^11 N/M^2. If the inter atomic spacing for the metal is 2.8 angstrom. Find the increase in the inter atomic spacing for a force of 10^9 N/M^2,and the force constant?

One planet is 6.00 x10^5 m. Another planet is 1.4 x 10^27kg. The radius is 7.14 x 10^7. Find the period.

If the radius of Earth decreased, with no change in mass, your weight would _____.

Which of these configurations is not a FET configuration?
common source
common drain
common gate
common base
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A uniform bar,12 ft long weighs 10 kg. A 5 kg is at one end and an 8 kg weigh is 2 ft from the other end. At what point will the bar be supported so that the system will remain horizontal?