What Kepler's constant ? ? ! ?
The only constant in Kepler's laws is in the third one, where it says something to the
effect that (square of a body's period) / (cube of its distance from the central body)
is a constant.
That means it's a constant for multiple little ones orbiting the same central body.
But it's not the same constant for other central bodies.
It's one constant for the planets, asteroids, and comets orbiting the sun.
It's a different constant for the moon, TV satellites, weather satellites,
and military satellites orbiting the Earth.
Answer:
The number of oxygen molecules in the left container greater than the number of hydrogen molecules in the right container.
Explanation:
Given:
Molar mass of oxygen, ![M_O=32](https://tex.z-dn.net/?f=M_O%3D32)
Molar mass of hydrogen, ![M_H=2](https://tex.z-dn.net/?f=M_H%3D2)
We know ideal gas law as:
![PV=nRT](https://tex.z-dn.net/?f=PV%3DnRT)
where:
P = pressure of the gas
V = volume of the gas
n= no. of moles of the gas molecules
R = universal gs constant
T = temperature of the gas
∵![n=\frac{m}{M}](https://tex.z-dn.net/?f=n%3D%5Cfrac%7Bm%7D%7BM%7D)
where:
m = mass of gas in grams
M = molecular mass of the gas
∴Eq. (1) can be written as:
![PV=\frac{m}{M}.RT](https://tex.z-dn.net/?f=PV%3D%5Cfrac%7Bm%7D%7BM%7D.RT)
![P=\frac{m}{V}.\frac{RT}{M}](https://tex.z-dn.net/?f=P%3D%5Cfrac%7Bm%7D%7BV%7D.%5Cfrac%7BRT%7D%7BM%7D)
as: ![\frac{m}{V}=\rho\ (\rm density)](https://tex.z-dn.net/?f=%5Cfrac%7Bm%7D%7BV%7D%3D%5Crho%5C%20%28%5Crm%20density%29)
So,
![P=\rho.\frac{RT}{M}](https://tex.z-dn.net/?f=P%3D%5Crho.%5Cfrac%7BRT%7D%7BM%7D)
Now, according to given we have T,P,R same for both the gases.
![P_O=P_H](https://tex.z-dn.net/?f=P_O%3DP_H)
![\rho_O.\frac{RT}{M_O}=\rho_H.\frac{RT}{M_H}](https://tex.z-dn.net/?f=%5Crho_O.%5Cfrac%7BRT%7D%7BM_O%7D%3D%5Crho_H.%5Cfrac%7BRT%7D%7BM_H%7D)
![\Rightarrow \frac{\rho_O}{32}=\frac{\rho_H}{2}](https://tex.z-dn.net/?f=%5CRightarrow%20%5Cfrac%7B%5Crho_O%7D%7B32%7D%3D%5Cfrac%7B%5Crho_H%7D%7B2%7D)
![\rho_O=16\rho_H](https://tex.z-dn.net/?f=%5Crho_O%3D16%5Crho_H)
∴The molecules of oxygen are more densely packed than the molecules of hydrogen in the same volume at the same temperature and pressure. So, <em>the number of oxygen molecules in the left container greater than the number of hydrogen molecules in the right container.</em>
Answer:
M.A = load/ effort
1200N/400N
= 3
velocity ratio= radius of wheel/radius of Axle
40cm/10cm
=4
efficiency= 3/4*100
75%
Answer:
yes
Explanation:
All parts of the body (muscles, brain, heart, and liver) need energy to work. This energy comes from the food we eat. Our bodies digest the food we eat by mixing it with fluids (acids and enzymes) in the stomach.