The answer is C. nebular are star nurseries. When the massive gas being collapsing in its own weight. Local areas of gas begin to coalesce under gravity. Due to enormous pressure, nuclear fusion begins and a protostar is formed. The protostar grows into the sun as more hydrogen fuses at the core. The planetesimal materials at the edges of the protostellar discs coalesce to form planets that orbit the star.
<h2>
Hello!</h2>
The answer is:
The buoyant force is equal to 49N.
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Why?</h2>
The buoyant force is the force that pushes upwards and object when it's submerged in water, this force is always trying to move the object to the surface of the liquid or water. We must consider that the volume of water or liquid displaced is equal to the volume of the submerged object.
We can calculate the buoyant force using the following formula:

Where,
Density is the density of the water or liquid.
Volume displaced is equal to the volume of the submerged object.
Gravity acceleration is the acceleration due to gravity.
So, from the statement we know that:

Now, substituting and calculating we have:




Hence, we have that the correct answer is:
The buoyant force is equal to 49N.
Have a nice day!
Answer:
d = 49.5 m
hence we can say it is conceivable that he can distinguish sports stadiums on earth's surface but in Private houses? Cars? it can not becayuse they are are very small
Explanation:
Given data
altitude = 150 km
diameter = 2.0 mm
wavelength = 550 nm
to find out
is it conceivable that he can distinguish sports stadiums
solution
we will apply here formula that is
∅ = 1.2 λ / D
put here λ = 550 ×
m and D = 2 ×
m
∅ = (1.2 ) 550 ×
/ 2 ×
∅ = 3.30 ×
rad
so
d = 150 ×
× 3.30 ×
d = 49.5 m
hence we can say it is conceivable that he can distinguish sports stadiums on earth's surface but in Private houses? Cars? it can not becayuse they are are very small