Wednesday
July 30, 2014

Homework Help: physics

Posted by Joshua Pams on Thursday, December 19, 2013 at 2:45am.

1. Calculate the de Broglie wavelength in picometers (1 picometer =10^−12 meters) of an electron that has kinetic energy of 10 keV. The mass of an electron is 9.11 x 10^−31 kg

2. Winter is coming, so I want to make a 1500 W heating coil which will plug into a 120 V wall outlet. The coil will have a cross sectional area of 0.01 cm^2 and a length (when fully unwound) of 5 m.

Determine the resistivity of the coil required, in Ωcm:

3. At 300 K we see the electron concentration in the conduction band for pure (undoped) Si is 10^10/cm^3. How many electrons per Si atom is this? You can use scientific notation, as in A.AAeB

Si is diamond cubic with 8 Si atoms per unit cell and a lattice parameter of 0.543 nm.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

physics - Calculate the de Broglie wavelength in picometers (1 picometer =10^&#...
Physics - A particle has a de Broglie wavelength of 3.30 x 10^-10 m. Then its ...
physics - A particle has a de Broglie wavelength of 3.30 10-10 m. Then its ...
Physics - Calculate the de Broglie wavelength of a proton moving at 5.50x10^5 m/...
College Physics II - 1) An electron moving with a speed of 2.84E+6 m/s has the ...
Chemistry - What is the de Broglie wavelength of an oxygen molecule, O2 ...
de Broglie Wavelength - The presence of oxygen atoms on the surface results in ...
College Physics II - What is the de Broglie wavelength of electrons with the ...
Chemistry - Neutron diffraction is used in determining the structures of ...
chemistry - calculate the de broglie wavelength of He atom at 27 degree celsius...

Search
Members