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3 years ago

Why is the sky blue

Physics

1 answer:

ZanzabumX [31]3 years ago

6 0

The answer is B. Gases and particles in earth’s atmosphere scatter sunlight in all directions

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If we mechanically expand a gas into a larger volume, while keeping the temperature constant, what happens to the pressure?

bezimeni [28]

C. The pressure decreases, and we can precisely predict by how much.

4 0

3 years ago

One way to cool a gas is to let it expand. When a certain gas under a pressure of 5.00 x 10^6 Pa at 25.°C is allowed to expand t

hichkok12 [17]

Answer:

The final temperature is T2= 5.35°C

Explanation:

Apply the Gay-lussacs's law we have

$\frac{P1}{T1} = \frac{P2}{T2}$

P1, initial pressure= 5.00 x 10^6 Pa

T1, initiation temperature= 25.°C

P2, final pressure= 1.07 x 10^6 Pa

T2, final temperature= ?

$\frac{5.00 * 10^6}{25} =\frac{1.07 *10^6}{T2} \\$

Cross multiplying and making T2 subject of formula we have

$T2 =\frac{1.07 *10^6*25}{5.00 * 10^6} \\\\T2= \frac{26.75}{5} \\T2= 5.35$

T2= 5.35°C

6 0

3 years ago

How do I solve this problem?<br> Can someone please help?

babymother [125]

Which were difficulties that the builders of the transcontinental railroad found ways to overcome? Select all the choices that apply.

Answer: Out of all the options presented above the ones that represent the difficulties that the builders of the transcontinental railroad found ways to overcome are answer choices A) providing supplies to build the tracks and support the workers and B) natural barriers such as mountains, rivers, and forests. It was also the same reason why the transcontinental railroad was being constructed. It would help the transportation of if this is hitory i dont know what subject this is but if its history heres the answers

4 0

3 years ago

The _______ theory states that the Moon formed as the result of a collision between Earth and a Marssized object.

FromTheMoon [43]

D.) giant impact

hope this helps

4 0

3 years ago

8–4. The tank of the air compressor is subjected to an internal pressure of 90 psi. If the internal diameter of the tank is 22 i

slamgirl [31]

Answer:

The stress S = 1935 [Psi]

Explanation:

This kind of problem belongs to the mechanical of materials field in the branch of the mechanical engineering.

The initial data:

P = internal pressure [Psi] = 90 [Psi]

Di= internal diameter [in] = 22 [in]

t = wall thickness [in] = 0.25 [in]

S = stress = [Psi]

Therefore

ri = internal radius = (Di)/2 - t = (22/2) - 0.25 = 10.75 [in]

And using the expression to find the stress:

$S=\frac{P*D_{i} }{2*t} \\replacing:\\S=\frac{90*10.75 }{2*0.25} \\S=1935[Psi]$

In the attached image we can see the stress σ1 & σ2 = S acting over the point A.

4 0

3 years ago