A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is 408 pm. Calculate the number of atoms in t
he unit cell and diameter of the metal atom.
1 answer:
Answer:288 pm
Explanation:
Number of atoms(s) for face centered unit cell -
Lattice points: at corners and face centers of unit cell.
For face centered cubic (FCC), z=4.
- whereas
For an FCC lattices √2a =4r =2d
Therefore d = a/√2a = 408pm/√2a= 288pm
I think with this step by step procedure the, the answer was clearly stated.
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Answer:
(i) 169.68 volt
(ii) 16.90 volt
(iii) 16.90 volt
(iv) 108.07 volt
(v) 2.161 A
Explanation:
Turn ratio is given as 10:1
We have given that input voltage
(i) We know that peak voltage is give by
(ii) We know that for transformer
So
So peak voltage in secondary will be 16.90 volt
(iii) Peak voltage of the rectifier will be equal to the peak voltage of the secondary
So peak voltage of the rectifier will be 16.90 volt
(iv) Dc voltage of the rectifier is given by
(v) Now dc current is given by
Answer:
(a) the mass flow rate of air is 5.351 kg/s
(b) the input power required is 2090.786 kW
Explanation:
Given;
initial pressure, P₁ = 100 kPa
initial temperature, T₁ = 20 °C
Final pressure, P₂ = 1.8 MPa
Final temperature, T₂ = 400 °C
Inlet area of the compressor = 0.15 m²
outlet area of compressor = 0.078 m²
velocity of air = 30 m/s
Part (a) mass flow rate of air through the inlet
Mass flow rate = Area x velocity = density x volumetric rate
m = Av = ρV
from ideal gas law, PV = nRT and ρ = m/V
substitute these values in the above equations, we will have;
Part (b) the required power input
where;
W is the input power
m is the mass flow rate
h₁ is the initial enthalpy
h₂ is the final enthalpy
initial and final enthalpy are obtained from steam table using interpolation;
h₁ = 293.166 kJ
h₂ = 684.344 kJ