Answer:
maybe talc because it is the softest type of rock
Explanation:
Try B, i think the answer is B
Answer:
The thermal efficiency of an engine is
that is 15%
Explanation:
Specific heat of a gas at constant volume is
![C_{v}=\frac{fR}{2}](https://tex.z-dn.net/?f=C_%7Bv%7D%3D%5Cfrac%7BfR%7D%7B2%7D)
here,
degree of freedom
universal gas constant
Thermal efficiency of a cycle is
![\frac{total workdone}{gross heat absorbed}](https://tex.z-dn.net/?f=%5Cfrac%7Btotal%20workdone%7D%7Bgross%20heat%20absorbed%7D)
Gross heat absorbed is amount of heat that absorbed.
ω![=P_{o} V_{o}](https://tex.z-dn.net/?f=%3DP_%7Bo%7D%20V_%7Bo%7D)
Δ
ω![_{AB}](https://tex.z-dn.net/?f=_%7BAB%7D)
![=nC_{v}(T_{f}-T_{i} )](https://tex.z-dn.net/?f=%3DnC_%7Bv%7D%28T_%7Bf%7D-T_%7Bi%7D%20%29)
![=n\frac{f}{2}(RT_{f}-RT_{i} )](https://tex.z-dn.net/?f=%3Dn%5Cfrac%7Bf%7D%7B2%7D%28RT_%7Bf%7D-RT_%7Bi%7D%20%20%29)
![=\frac{f}{2}(P_{o}V_{o} )](https://tex.z-dn.net/?f=%3D%5Cfrac%7Bf%7D%7B2%7D%28P_%7Bo%7DV_%7Bo%7D%20%20%29)
![Q_{BC}=n(\frac{f}{2}+1 )R(T_{f}-T_{i} )](https://tex.z-dn.net/?f=Q_%7BBC%7D%3Dn%28%5Cfrac%7Bf%7D%7B2%7D%2B1%20%29R%28T_%7Bf%7D-T_%7Bi%7D%20%29)
=![=(\frac{f}{2}+1)2P_{o}V_{o}](https://tex.z-dn.net/?f=%3D%28%5Cfrac%7Bf%7D%7B2%7D%2B1%292P_%7Bo%7DV_%7Bo%7D)
these 2 are not the part of gross heat
η![=\frac{P_{o}V_{o} }{(\frac{3f}{2}+2 )(P_{o}V_{o})}](https://tex.z-dn.net/?f=%3D%5Cfrac%7BP_%7Bo%7DV_%7Bo%7D%20%20%7D%7B%28%5Cfrac%7B3f%7D%7B2%7D%2B2%20%29%28P_%7Bo%7DV_%7Bo%7D%29%7D)
![=\frac{1}{(\frac{3f}{2}+2 )}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B1%7D%7B%28%5Cfrac%7B3f%7D%7B2%7D%2B2%20%29%7D)
For monoatomic gas ![f=3](https://tex.z-dn.net/?f=f%3D3)
η![=\frac{2}{13}](https://tex.z-dn.net/?f=%3D%5Cfrac%7B2%7D%7B13%7D)
![=0.15](https://tex.z-dn.net/?f=%3D0.15)
Assuming that there is missing information in this question I’m just going to go ahead and say that it’s lower.
HNO3 (nitric acid) is a very strong acid which should be found on the lower end of the pH scale. While water, on the other hand, is neutral and found at a pH of 7.
So if you add one drop of a strong acid into a neutral solution of 100ml let’s say, one can assume that the pH of that solution is now very low and probably found between 1-3 on a pH scale.
Reminder:
-Acids are found between 1-6 on the pH scale. The lower the number the stronger the acid
-Bases are found between 8-14 on the pH scale. The higher the number the stronger the base