Answer:
Nitric acid, also known as aqua fortis and spirit of niter, is a highly corrosive mineral acid. The pure compound is colorless, but older samples tend to acquire a yellow cast due to decomposition into oxides of nitrogen and water. Most commercially available nitric acid has a concentration of 68% in water.
Explanation:
Answer:
0.30581
0.24464
Explanation:
= Coefficient of static friction
= Coefficient of kinetic friction
= 75 N
= 60 N
Normal force
![F_n=mg\\\Rightarrow F_n=25\times 9.81\\\Rightarrow F_n=245.25\ N](https://tex.z-dn.net/?f=F_n%3Dmg%5C%5C%5CRightarrow%20F_n%3D25%5Ctimes%209.81%5C%5C%5CRightarrow%20F_n%3D245.25%5C%20N)
Frictional force
![F_f=\mu_sF_n\\\Rightarrow \mu_s=\frac{F_f}{F_n}\\\Rightarrow \mu_s=\frac{75}{245.25}\\\Rightarrow \mu_s=0.30581](https://tex.z-dn.net/?f=F_f%3D%5Cmu_sF_n%5C%5C%5CRightarrow%20%5Cmu_s%3D%5Cfrac%7BF_f%7D%7BF_n%7D%5C%5C%5CRightarrow%20%5Cmu_s%3D%5Cfrac%7B75%7D%7B245.25%7D%5C%5C%5CRightarrow%20%5Cmu_s%3D0.30581)
The coefficient of static friction is 0.30581
Kinetic force
![F_k=\mu_kF_n\\\Rightarrow \mu_k=\frac{F_k}{F_n}\\\Rightarrow \mu_s=\frac{60}{245.25}\\\Rightarrow \mu_s=0.24464](https://tex.z-dn.net/?f=F_k%3D%5Cmu_kF_n%5C%5C%5CRightarrow%20%5Cmu_k%3D%5Cfrac%7BF_k%7D%7BF_n%7D%5C%5C%5CRightarrow%20%5Cmu_s%3D%5Cfrac%7B60%7D%7B245.25%7D%5C%5C%5CRightarrow%20%5Cmu_s%3D0.24464)
The coefficient of kinetic friction is 0.24464
The choices can be found elsewhere and as follows:
a. <span>Alpha Centauri </span>
<span>c. </span><span>T-tauri </span>
<span>b. </span><span>The Big Bang </span>
<span>d. </span><span>Nebular
</span>
I believe the correct answer from the choices listed above is option D. <span>Strong solar winds blew dust and gas out of the solar system during Nebular phase. This seems to be the most logical option from the choices. Hope this helps. Have a nice day.</span>
Answer:
the planes wings are lifting at an angle to gravity so the plane isn't lifting as much against gravity when it banks. some of the wing lift is going into turning the plane. :) so it needs more lift to bank and stay up
Explanation:
At stp (standard temperature and pressure), the temperature is T=0 C=273 K and the pressure is p=1.00 atm. So we can use the ideal gas law to find the number of moles of helium:
![pV=nRT](https://tex.z-dn.net/?f=pV%3DnRT)
where p is the pressure (1.00 atm), V the volume (20.0 L), n the number of moles, T the temperature (273 K) and
![R=0.082 atm L K^{-1} mol^{-1}](https://tex.z-dn.net/?f=R%3D0.082%20atm%20L%20K%5E%7B-1%7D%20mol%5E%7B-1%7D)
the gas constant. Using the numbers and re-arranging the formula, we can calculate n: