For the first won is d the answerd
Answer:
The minimum intensity of light required is .
Explanation:
Number of elections , N=
Energy of each electron = E =
Total energy of N elections = T
The minimum intensity of light in Watts required to eject N electron sin 0.20 seconds :
We will measure all angles from West, the negative x-axis and divide the journey into 3 parts:
P1 = 370y
P2 = 410cos(45)x + 410sin(45)y = 290x + 290y
P3 = 370cos(270 - 28)x + 370sin(270 - 28) = -174x - 327y
Overall displacement:
x = 290 - 174 = 116 m
y = 370 + 290 - 327 = 333 m
displacement = √(116² + 333²)
= 353 m
Direction:
tan(∅) = y/x
∅ = tan⁻¹ (333 / 116)
∅ = 70.8° from West.
Part a
Answer:
For the arrangement considered in part a, all the atoms are aligned side by side along the side of the square surface.
Along one side of the square, the number of atoms that could fit
This is along one side. On the entire surface:
Number of atoms
Part b
Answer:
consider the attached figure below:
The next layer of atoms are filled in the depressions of the first layer. The vertical distance between the two atoms would change. Consider an equilateral triangle drawn by joining the centers of the three atoms.
The atoms along the horizontal side would be aligned side by side; same as above
The number of atoms along vertical side would vary. vertical distance between two atoms can be calculate using equilateral triangle as shown below.
an equilateral triangle has all the angles
Let the vertical distance be y.
Then,
where r is the radius of each atom.
The number of atoms along the vertical side
Total number of atoms in this kind of arrangement