Answer:
It can be shown that the potential energy of an object at the surface of the planet would be -G M / R if the potential at infinity is chosen to be zero.
Kinetic energy of G M / R would be required for the escape speed of such an object. The total energy in all such cases is zero.
This can easily be seen by considering the speed of an object falling from infinity towards the planet - the total energy will remain zero if it was zero when the object started to fall.
Answer:
b
Explanation:
because f its electronic configuration 2:8 indicating that it has 8 electrons in its outer most energy level
Answer:
The force exerted by the muscle is 852.27N
Explanation:
Force F exerted by the muscle is expressed as a function of the torque τ and the effective perpendicular arm r.
F = τ/r ... (1)
Where τ = moment of inertia I × angular acceleration α
τ = Iα ... (2)
Substituting equation 2 into 1 to get F will give;
F = Iα/r
Given the following parameters
I = 0.75kgm²
α = 37.5rad/s²
r = 3.30cm = 0.033m
F = 0.75(37.5)/0.033
F = 28.125/0.033
F = 852.27N
The force exerted by the muscle is 852.27N
Answer:
The <u>water vapor</u> will have the greatest entropy at the triple point
Explanation:
At the triple point of water, which has the properties of 0.0075°C temperature and 6.11657 mbar pressure, solid ice, liquid water and water vapor exist together in a location
According to Professor Stephen Lower on LibreTexts website entropy is a measure the extent to which thermal energy is shared and spread in a system
The change in entropy, ΔS = ΔH/T
The heat change in
= 6.01 kJ/mol
The heat change in vaporization,
= 45.05 kJ/mol
The heat change in sublimation,
= 51.06 kJ/mol
Therefore, the entropy of the water vapor
> The entropy of liquid water,
> The entropy of the solid ice, ![S_{Solid \, ice}](https://tex.z-dn.net/?f=S_%7BSolid%20%5C%2C%20ice%7D)
The portion with the highest entropy at the triple point is the water vapor
The water vapor will have the greatest entropy at the triple point