Answer:
0.056 psi more pressure is exerted by filled coat rack than an empty coat rack.
Explanation:
First we find the pressure exerted by the rack without coat. So, for that purpose, we use formula:
P₁ = F/A
where,
P₁ = Pressure exerted by empty rack = ?
F = Force exerted by empty rack = Weight of Empty Rack = 40 lb
A = Base Area = 452.4 in²
Therefore,
P₁ = 40 lb/452.4 in²
P₁ = 0.088 psi
Now, we calculate the pressure exerted by the rack along with the coat.
P₂ = F/A
where,
P₂ = Pressure exerted by rack filled with coats= ?
F = Force exerted by filled rack = Weight of Filled Rack = 65 lb
A = Base Area = 452.4 in²
Therefore,
P₂ = 65 lb/452.4 in²
P₂ = 0.144 psi
Now, the difference between both pressures is:
ΔP = P₂ - P₁
ΔP = 0.144 psi - 0.088 psi
<u>ΔP = 0.056 psi</u>
Answer:
I would measure the distance between points A and B
<span>The mass of a 20 kg object is the same anywhere in the universe. That's its
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The troposphere<span> is the first layer above the surface and contains half of the Earth's atmosphere. </span>Weather<span> occurs in this layer. </span><span> Many jet aircrafts fly in the </span>stratosphere<span> because it is very stable. Also, the ozone layer absorbs harmful rays from the Sun.</span><span> Meteors or rock fragments burn up in the </span>mesosphere.<span>The </span>thermosphere<span> is a layer with auroras. It is also where the space shuttle orbits. </span><span>The atmosphere merges into space in the extremely thin </span>exosphere<span>. This is the upper limit of our atmosphere.
I'm not sure if this helps you but I would say most of the changes happen in the troposphere because that is where the weather occurs. Sorry if this isn't the answer you were looking for.
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