A Ping-Pong ball is given an upward initial velocity. The force of air resistance causes the times of ascent and descent to be u
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Answer:
Please find attached file for complete answer solution and explanation of same question.
Explanation:
To solve this problem it is necessary to apply the relationship given by the intrinsic carrier concentration, in each of the phases.
The intrinsic carrier concentration is the number of electrons in the conduction band or the number of holes in the valence band in intrinsic material. This number of carriers depends on the band gap of the material and on the temperature of the material.
In general, this can be written mathematically as
Both are identical semiconductor but the difference is band gap which is:
The ratio between the two phases are given as:
Therefore the ratio of intrinsic carrier densities for the two materials at room temperature is 0.145
Answer:
Explanation:
It is given that,
Speed of P- waves, v = 9 km/s = 9000 m/s
The density of rock is about
We need to find the average bulk modulus of Earth's crust. Let it is given by B. So,
So, the bulk modulus of the Earth's crust is .