Answer:
Approximate atomic radius for polonium-209 is 167.5 pm .
Explanation:
Number of atom in simple cubic unit cell = Z = 1
Density of platinum =
Edge length of cubic unit cell= a = ?
Atomic mass of Po (M) = 209 g/mol
Formula used :
where,
ρ = density
Z = number of atom in unit cell
M = atomic mass
= Avogadro's number
a = edge length of unit cell
On substituting all the given values , we will get the value of 'a'.
Atomic radius of the polonium in unit cell = r
r = 0.5a
Approximate atomic radius for polonium-209 is 167.5 pm.
Answer:
Explanation:
Given
length=8 m
width=4 m
deep=4 m
Area of base
hydro static Pressure on bottom
Force on bottom
Now pressure at the side wall
where is the mean length of wall = 4 m
I’m pretty sure that it’s D
Ignoring air resistance, the fall has no effect on its horizontal speed. Traveling horizontally at 150 m/s for 25 seconds, it'll cover
(25) x (150m) = 3,750 meters
(about 2.3 miles)
Please find the figure attached below:
Answer:
a.Resistance of bulb==192 ohm
b.power consumed by bulb after motor disconnection=74.609 W
Explanation:
<u>a.Resistance of bulb=</u><u>=?</u>
As we know that
putting R as resistance of bulb i.e.
<u>b.power consumed by bulb after motor disconnection? </u>
from the figure we see that are in series so
current through their resistance is
Power consumed by bulb is