What is the perimeter of 2m 10cm by 45cm
2 answers:
<u>the correct question is</u>
What is the perimeter of a rectangle that is 2m 10cm by 45cm?
we know that
The perimeter of a rectangle is equal to
where
L is the length of the rectangle
W is the width of the rectangle
In this problem we have
substitute the values in the formula
therefore
<u>the answer is</u>
The perimeter is equal to
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Answer: Lattice parameter, a = (4R)/(√3)
Step-by-step explanation:
The typical arrangement of atoms in a unit cell of BCC is shown in the first attachment.
The second attachment shows how to obtain the value of the diagonal of the base of the unit cell.
If the diagonal of the base of the unit cell = x
(a^2) + (a^2) = (x^2)
x = a(√2)
Then, diagonal across the unit cell (a cube) makes a right angled triangle with one side of the unit cell & the diagonal on the base of the unit cell.
Let the diagonal across the cube be y
Pythagoras theorem,
(a^2) + ((a(√2))^2) = (y^2)
(a^2) + 2(a^2) = (y^2) = 3(a^2)
y = a√3
But the diagonal through the cube = 4R (evident from the image in the first attachment)
y = 4R = a√3
a = (4R)/(√3)
QED!!!
