Engineering, 25.01.2020 00:31, haithjamel

Measurements on sodium have provided the following data:
resistivity is 4.7 ×10^(-8) ohm m, hall coefficient is -2.5 ×10^(-10) m^3 c^(-1), the critical wavelength of transparency is 210 nm, and density is 971 kg m^(-3)
calculate:
i. the density of electrons.
ii. the mobility.
iii. the effective mass.
iv. the collision time.
v. the number of electrons per atom available for conduction.
electric conduction in sodium is caused by electrons. the number of atoms in a kg mole is 6.02 × 10^26 and the atomic weight of sodium is 23.

Answers: 3

Show answers

Other questions on the subject: Engineering

Engineering, 04.07.2019 18:10, ashleybaber4966

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

Answers: 1

continue

Engineering, 04.07.2019 18:10, kevin72836

Consider a large isothermal enclosure that is maintained at a uniform temperature of 2000 k. calculate the emissive power of the radiation that emerges from a small aperture on the enclosure surface. what is the wavelength ? , below which 10% of the emission is concentrated? what is the wavelength ? 2 above which 10% of the emission is concentrated? determine the wavelength at which maximum spectral emissive power occurs. what is the irradiation incident on a small object placed inside the enclosure?

Answers: 2

continue

Engineering, 04.07.2019 19:20, amandaaarmentaa

Acircular pipe of 30mm outside diameter is placed in an airstream at 30 c and latm pressure. the air moves in cross flow over the pipe at 20 m/s, while the outer surface of the pipe is maintained at 110 c. what is the drag force exerted on the pipe per unit length? what is the rate of heat transfer from the pipe per unit length?

Answers: 1

continue

Engineering, 06.07.2019 03:10, lwattsstudent

List and describe in sequence the operation process steps for boxf machine?

Answers: 1

continue

Do you know the correct answer?

Measurements on sodium have provided the following data:
resistivity is 4.7 ×10^(-8) ohm m,...