Purchase Solution

Fermi problems and equivalents

Not what you're looking for?

Ask Custom Question

3 fermi problems:

Q1) Estimate the number of atoms in a Trex?
Q2) What is 10amu in kg?
Q3) Estimate the number of hairs on a dog?

Purchase this Solution
Solution Summary

The expert estimates the number of atoms in a Trex. The number of hairs on a dog is also estimated using Fermi equivalents.

Solution Preview

Hello and thank you for submitting your questions to Brainmass.

Here are my estimates:

Q1:

The esitimated weight of a T-rex is about 4 tons. If we assume that the averageatom in the T-rex is carbon (there are also calcium, oxygen nitrogen and ofcourse hydrogen), and we know that one mol of carbon has the weight of 12 grams, then we can see thet the number of mols of carbon in T-rex is:

m = (4tons) * (10^6 gr/ton) / (12 ...

Purchase this Solution
Free BrainMass Quizzes
Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.

The Moon

Test your knowledge of moon phases and movement.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

Basic Physics

This quiz will test your knowledge about basic Physics.

View More Free Quizzes
Related BrainMass Solutions

  • Compute the Fermi energy and momentum at absolute zero

    225920 Fermi energy and wavevector for a gas at absolute zero. Fermi energy and wavevector for a gas at absolute zero.

  • Angstrom Unit

    This solution is provided in a .doc file and gives a brief equation that is used to calculate fermi.

  • Fermi Function versus Energy

    ) in the conduction band and n_i is the concentration of intrinsic carriers in the intrinsic semi conductor, E_I is the Fermi level of the intrinsic semiconductor and T absolute temperature, k_B Boltzmann's constant.

  • Pressure of Fermi gas at Absolute zero

    185564 Pressure excerted by a Fermi gas, at absolute zero Show that the pressure exerted by a Fermi gas at absolute zero is p = (2NEf)/(5V) where N is the total number of particles, Ef the fermi energy and V is

  • Plot of the Fermi distribution function for different temperatures

    619219 Plot of the Fermi distribution function for different temperatures plot the fermi distribution function at 200,300 and 400k(all on grah) and discuss the results in comparison to question 4.

  • Fermi Energies of Fermi Gases

    175126 Fermi Energies of Fermi Gases See attachment for full problem and symbols. Calculate the Fermi energies Eg (in units of eV) and the corresponding Fermi temperatures TF for: a. Liquid 3He (density 0.0823 g cm^-3) b.

  • Quasi Fermi Level

    If tn0=tp0=10^-6s, calculate the position of the quasi-Fermi levels for electrons and holes with respect to the intrinsic level (assume that ni=1.5x10^10cm^-3). Please see attached for solution.

  • Separation of quasi Fermi levels, Efn, Efp, change in conductivity

    10380 Separation of Quasi and Intrinsic Fermi Levels and Conductivity An undoped Si sample is optically excited at 300K such that Gop=10^19 ehp/cm^3s and taun=taup=1 microseconds. (a) What is the separation of the quasi Fermi levels (Efn-Efp)?

  • Fermi Problems

    The solution contains answers to a couple of Fermi Problems which include the hair problem and also the number of pianos in the New York city.

View More Related Solutions