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kvasek [131]
2 years ago
5

A brick is released with no initial speed from the roof of a building and strikes the ground in 2.50 s, encountering no apprecia

ble air drag. How tall, in meters, is the building?
Physics
1 answer:
Elenna [48]2 years ago
6 0

Answer:A brick is released with no initial speed from the roof of a building and strikes the ground in 2.50 s, encountering no ..

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Given that the effective mass ratio of the electron is 0.11 and the effective mass ratio of the hole is 0.35, please calculate t
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Complete question:

CdTe has a band-gap energy εg of 1.6 eV and a dielectric constant εr of 10.9.

Given that the effective mass ratio of the electron is 0.11 and the effective mass ratio of the hole is 0.35, please calculate the ground-state energy (ie: n=1) of the donor and acceptor bands along with their orbital radii.

Answer:

The ground-state energy for donor is 2.6 meV

The ground-state energy for acceptor is 40.1  meV

Explanation:

Given;

effective hole mass, Mh = 0.35

effective electron mass, Me = 0.11

mass of electron, M₀ = 9.11 x 10⁻³¹

dielectric constant,  εr = 10.9

To determine the donor and acceptor energies, we apply the equation below;

E = 1 Rydberg x m*/(m₀εr²)

E = 13.606 eV x m*/(m₀εr²)

The ground-state energy for donor = 13.606 eV x M*/(M₀εr²)

                                                           = 13.606 eV x Me/(εr²)

                                                           = 13.606 eV x 0.11/((10.9)²)

                                                           = 2.6 meV

The ground-state energy for acceptor  = 13.606 eV x M*/(M₀εr²)

                                                                 =  13.606 eV x Mh/(εr²)

                                                                 = 13.606 eV x 0.35/((10.9)²)

                                                                 = 40.1  meV

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What are possible units for impulse? Check all that apply.
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Answer:

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Explanation:

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a jet plane traveling 1890 km/h pulls out of a dive by moving in an arc of radius 5.20km. what is planes acceleration in g's
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Answer:

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Explanation:

Unit conversions:

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