Question

A cube of silver (density = 10.5 g/cm^3) has a mass of 90.0 g a resistivity of 1.59x10^-8. The atomic number of silver is 47 and its molar mass is 107.87 g/mol

a.) find the length of the cubne on each side.

b.)What is the resistance between opposite faces of the cube?

c.) assume each silver atom contributes one conduction electron. average drift speed of electrons when potential difference of 10^-5 V is applied to the opposite faces

Answer #1

A chunk of aluminum has density of 2.7 g/cm3 and atomic mass of
26.98 g/mole; where each atom in the chunk contributes one
conduction electron. Calculate the following:-
1) the Fermi energy.
2) the Fermi temperature and
3) the degeneracy pressure.

The atomic mass of silver is 107.9. A cube of silver weighs
30.3g, and its density is 10.6 g/cm3.
Calculate
(i) the volume of the sample.
(ii) The number of silver atoms in the sample
(iii) If we consider the sample is composed of spherical atom
each with radius r and volume vatom=4/3 pi * R^3 ,and if we assume
that the total volume of the spheres in the sample is 74.0 % of the
total volume of the sample,...

Calculate the radius of an silver atom in cm, given that Ag has
an FCC crystal structure, a density of 10.5 g/cm3, and
an atomic weight of 107.87 g/mol.

1. Compute the resistivity of an intrinsic semiconductor at 300
K, in units of Ω-m, given that it has an intrinsic carrier
concentration of 4.9 x1022m-3 and electron and hole mobilities of
0.53 and 0.09 m2/V-s, respectively.
2.
The intrinsic concentration of electrons and holes (i.e.
concentration of e-h pairs) in Si at room temperature is
approximately 1x1010 cm-3.
Given the density and atomic mass of Si to be 2.33 g/cm3 and
28.06 g/mol, determine the ratio of ionized to...

2 Drift Velocity The average velocity of electrons in a material
with a scattering time τ is vd = eE me τ. The scattering time also
determines the resistivity of the material: ρ = me ne2τ . Here, n
is the free electron density of the material — the number of free
electrons per cubic meter. (a) Estimate the free electron density
in copper. There is one free electron per copper atom. The mass
density of copper is 8.92 g/cm3...

Calculate the average drift speed of electrons traveling through
a copper wire with a crosssectional area of 30 mm2 when carrying a
current of 30 A (values similar to those for the electric wire to
your study lamp). Assume one electron per atom of copper
contributes to the current. The atomic mass of copper is 63.5 g/mol
and its density is 8.93 g/cm3 . Avogadro’s number is 6.022 × 1023
and the fundamental charge is 1.602 × 10−19 C. Answer...

A cylindrical capacitor of length 1 cm, inner radius 0.010 cm,
and outer radius 0.015 cm is ﬁlled with water, which has dielectric
constant K = 80.10 at 20◦C. Assume the capacitor has been connected
to an ideal 6V battery for a long enough time for the system to
have reached equilibrium.
a). Find the surface charge densities in the water on both the
inner and outer surface. What is the ﬁeld ~ D as a function of r
inside...

(Include full solutions)
Silver has two stable isotopes. The nucleus,
10747Ag, has atomic mass 106.905095 g/mol
with an abundance of 51.83% ; whereas
10947Ag, has atomic mass 108.904754 g/ mol
with an abundance of 48.17%. Find the binding energy per nucleon
for each isotope.

The point of this problem is to show how slowly electrons travel
on average through a thin wire, even for large values of
current.
A wire made from copper with a cross-section of diameter 0.740
mm carries a current of 13.0 A. Calculate the "areal current
density"; in other words, how many electrons per square meter per
second flow through this wire? (Enter your answer without
units.)
The density of copper is 8.99 g/cm3, and its atomic mass is
63.8....

1. The mass of an average blueberry is 0.71 g and the mass of an
automobile is 2000 kg . Find the number of automobiles whose total
mass is the same as 1.0 mol of blueberries. Express your answer to
two significant figures. ??
2. A pure titanium cube has an edge length of 2.70 in . How many
titanium atoms does it contain? Titanium has a density of 4.50
g/cm3 . Express your answer to three significant figures ??...

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