Answer:
Step-by-step explanation:
surface area=4πr²=36π
r²=9
r=3
Answer:
5000 particles of size 10 nanometer should be stacked
Step-by-step explanation:
Average diameter of the of the human hair = 50 micron = 50 × 10⁻⁶ m
Now,
let the number of 10 nanometer i.e 10 × 10⁻⁹ m particle be 'n'
thus,
n × 10 × 10⁻⁹ m = 50 × 10⁻⁶ m
Therefore to find the number of 10 nanometer i.e 10 × 10⁻⁹ m particle,
n = 
or
n = 5000
Hence,
5000 particles of size 10 nanometer should be stacked
The numbers are unclear, please repost.
Thanks!
Brainliest?
Answer:
297 mm²
Step-by-step explanation:
22 mm × 18 mm = 396 mm²
(9 × 22) ÷ 2 = 99 mm²
396 mm² - 99 mm²
297 mm²
X=20
m∠ b=48
m∠ c=40
Show work
6*20-28=92
2*20=40