A sonic boom is caused by _____. a sound-producing object moving toward an observer a sound-producing object overtaking its own
2 answers:
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Answer:
Explanation:
From the given information:
Since both stars are in the same cluster, the magnitude and luminosity relationship can be calculated as:
Given that;
m_1 = 1 and
m_2 = 4
Therefore,
Making the subject of the formula:
=15.84
≅ 16
Hence, we can conclude that star X is more luminous by a factor of 16
Answer:
The pressure at any point in a column of gas is an exponential function
Explanation:
In the case of water due to the hydrostatic paradox, a liquid of any quantity can support any weight it is subjected to, as such the pressure at a point in a liquid is directly proportional to the depth. Analogous to stack of bricks
P = ρ×g×h
For gases we have that gas density depends on the gas pressure and pressure depends on gas density
This is as a result of the comprehensibility of gases in the atmosphere which is analogous to compressible bricks. A gas quickly spreads out to occupy a containing volume as such when subject to a force they are compressed to occupy a lesser volume.
However as the elevation increases it results in a lesser column of fluid exerting a force at that point hence reducing the pressure at that point.
We have for gases
where
= Pressure at height h
P₀ = Pressure at reference point
m = unit mass of air molecule
g = Acceleration due to gravity
h = Height from the reference point
k = Boltzmann constant
T = Temperature in Kelvin
The pressure at any point in a column of gas is an exponential function