To solve this question we will use ideal gas equation:
![p*V=n*R*T](https://tex.z-dn.net/?f=p%2AV%3Dn%2AR%2AT)
Where:
p = pressure
V = volume
n = number of moles
R = gas constant
T = temperature
We can rearrange formula to get:
![\frac{p*V}{T} =n*R](https://tex.z-dn.net/?f=%20%5Cfrac%7Bp%2AV%7D%7BT%7D%20%3Dn%2AR)
We are working woth same gas so we can write following formula. Index 1 stands for conditions before change and index 2 stands for conditions after change.
![\frac{ p_{1}*V_{1} }{T_{1}} = \frac{ p_{2}*V_{2} }{T_{2}}](https://tex.z-dn.net/?f=%20%5Cfrac%7B%20p_%7B1%7D%2AV_%7B1%7D%20%7D%7BT_%7B1%7D%7D%20%3D%20%5Cfrac%7B%20p_%7B2%7D%2AV_%7B2%7D%20%7D%7BT_%7B2%7D%7D%20)
We are given:
p1=92.1kPa = 92100Pa
V1=200mL = 0.2L
T1=275K
p2= 101325Pa
T2=273K
V2=?
We start by rearranging formula for V2. After that we can insert numbers:
Global warming is just one aspect of climate change. “Global warming” refers to the rise in global temperatures due mainly to the increasing concentrations of greenhouse gases in the atmosphere. “Climate change” refers to the increasing changes in the measures of climate over a long period of time – including precipitation, temperature, and wind patterns.
Assuming our "closed tube" is closed at only one end, then
<span> v = fλ = f*4L/n
</span><span> where "n" is the harmonic number. So
</span><span> L = nv / 4f = n*346m/s / 4*256Hz = n*0.38 m
</span> <span>Since the only option in your list that is an integer multiple of 0.38 m is 1.35 m
</span><span> I'd say that we're hearing the fourth harmonic.
answer is
</span><span>A. 1.35 m</span><span>
</span>