Answer:
5E22 atoms/cm³
Explanation:
We need to find the number of moles of silicon per cm³
number of moles per cm³ = density/atomic weight = 2.33 g/cm ÷ 28.09 g/mol = 0.083 mol/cm³.
Since there are 6.022 × 10²³ atoms/mol, then the number of atoms of silicon per cm³ = number of atoms per mol × number of moles per cm³
= 6.022 × 10²³ atoms/mol × 0.083 mol/cm³
= 0.4995 × 10²³ atoms/cm³
= 4.995 × 10²² atoms/cm³
≅ 5 × 10²² atoms/cm³
= 5E22 atoms/cm³
The answer seems pretty obvious, all of the above
Answer:
The correct answer is option (c) An experimental observation that the velocity of a fluid in contact with a solid surface is equal to the velocity of the surface.
Explanation
Solution:
When a fluid is in proximity to the boundary the solid and the velocities are the same or uniform for the fluid and the surface, no slip condition does not exist.
However, because the no-slip meets the expectations for gas and liquids, this condition no way connected in this case of two solid in proximity.
hence, the other options are wrong here.
Answer: So a 1 pound = 0.453592kg
the density of the water is D= 997 kg/
so we need to use replace the kg with pounds with 2.20462 pounds = 1kg.
then D = 2.20462*997 pounds/
and we want to make this equal to one changing the metters for other thing.
we need to replace 
with 2.020462*997 meters qube.
then our new metters variable x = 12.6meters.
now g = 9.8 meters for second square.
in our new lenght variable x.
g = 12.6*9.8 x for second square.
so if y is our new time variable
= 12.6*9.8 seconds square. so y = 11.1seconds
so the units of length are x = 12.6 meters and for time y = 11.1 seconds.
