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Bond [772]
3 years ago
10

A container of gas is at a pressure of 3.7 x 105 pa. how much work is done by the gas if its volume expands by 1.6 m3? show your

work.
Physics
2 answers:
dem82 [27]3 years ago
7 0
<span>W = P(deltaV)
W = (3.7 X 10^5)(1.6) = 5.92 X 10^5 Joules </span>
melomori [17]3 years ago
7 0

Answer:

5.92x10^5 J

Explanation:

In order to solve this, you need to know the expression or formula to use. In this case:

W = P * ΔV

Where:

P = pressure

V = change in volume.

Now, this is actually easy, and we need to put the values given in the exercise in the above expression and solve for W. Remember that 1 Pa is 1 kg/ m.s²

W = 3.7x10^5 kg / m.s² * 1.6m³

W = 592,000 kg/ m².s²

And 1 kg / m².s² = 1 J so

W = 592,000 J or simply 5.92x10^5 J or even 592 kJ

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Um objeto de 4cm de altura está a 30cm de um espelho côncavo, cujo raio de curvatura tem valor absoluto de 20cm.
Shkiper50 [21]

a) The distance of the image from the mirror is 15 cm

b) The size of the image is -2 cm (inverted)

Explanation:

a)

We can solve this first part of the problem by applying the mirror equation:

\frac{1}{f}=\frac{1}{p}+\frac{1}{q}

where

f is the focal length

p is the distance of the object from the mirror

q is the distance of the image from the mirror

For a mirror, the focal length is half the radius of curvature, R:

f=\frac{R}{2}

For this mirror, R = 20 cm, so its focal length is

f=\frac{20}{2}=+10 cm (positive for a concave mirror)

Here we also know:

p = 30 cm is the distance of the object from the mirror

So, by applying the equation, we can find q:

\frac{1}{q}=\frac{1}{f}-\frac{1}{p}=\frac{1}{10}-\frac{1}{30}=\frac{1}{15} \rightarrow q = 15 cm

b)

We can solve this part by using the magnification equation:

M=-\frac{y'}{y}=\frac{q}{p}

where

y' is the size of the image

y is the size of the object

q is the distance of the image from the mirror

p is the distance of the object from the mirror

Here we have:

q = 15 cm

p = 30 cm

y = 4 cm

Solving for y', we find the size of the image:

y'=-y\frac{q}{p}=-(4)\frac{15}{30}=-2 cm

and the negative sign means that the image is inverted.

#LearnwithBrainly

6 0
3 years ago
Two sealed 1 l containers full of gas are at room temperature. Container a has a pressure of 4 atm and container b has a pressur
loris [4]

Answer:

The number density of the gas in container A is twice the number density of the gas in container B.

Explanation:

Here we have

P·V =n·R·T

n = P·V/(RT)

Therefore since V₁ = V₂ and T₁ = T₂

n₁ = P₁V₁/(RT₁)

n₂ = P₂V₂/(RT₂)

P₁ = 4 atm

P₂ = 2 atm

n₁ = 4V₁/(RT₁)

n₂ =2·V₁/(RT₁)

∴ n₁ = 2 × n₂

Therefore, the number of moles in container A is two times that in container B and the number density of the gas in container A is two times the number density in container B.

This can be shown based on the fact that the pressure  of the container is due to the collision of the gas molecules on the walls of the container, with a kinetic energy that is dependent on temperature and mass, and since the temperature is constant, then the mass of container B is twice that of A and therefore, the number density of container A is twice that of B.

5 0
3 years ago
Matter is anything that has
Svetlanka [38]

Answer:

Space

Explanation:

Hope this helped

8 0
3 years ago
The molecular compound that has a ratio of two oxygen atoms<br> to one carbon atom is named
Ierofanga [76]

Answer: C02 (Carbon Dioxide)

8 0
3 years ago
What causes the angle of the sun’s rays to change during the year on Earth?
amm1812

The tilt of Earth's axis hope this helps

4 0
3 years ago
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