Then how come in free expansion (to vacuum) temperature does not change?
energy density drops, distance between particles increase, less likelihood of collisions and yet internal energy remains the same which is a function of temperature.
In thermodynamic books I read free expansion does NOT change the temperature of the gas as no work is done against any medium. Therefore initial internal energy equals to final and as internal energy only the function of temperature the temperature does not go down.
I keep reading after the Big...
When a meteoroid enters the atmosphere and becomes a meteor, it burns due to great fraction between the rock and and the air. But how scientists calculate the exact amount of kinetic energy converted to heat due to fricton and how much of this is used to heat up the rock and how much of it is...
when a sprinter starts running he applies force to overcome fraction and air drag. is his speed keeps going up as F=ma governs to? if he's stamina was enough to fuel him for hours will his speed will keep going up and up even though he applies a constant force until the air drag force becomes so...
Imagine a light (500gr) of package is moving on a conveyor from west to east with a speed 250 m/minute.
I have a heavy device(metal stick) that'll hit it from north to south direction so that the package will rotate to south keeping it's initial speed.
What should be the formula to...
I understand but I think it's a bit misleading the way the question asked saying "A house has well-insulated walls..." as if the house is "sealed" as you put it. Or it's just me as I immediately thought the air inside is trapped and it's getting hotter and the pressure is rising.
As for the...
What is dV then? What would you put as "initial" and "final" volumes in W=Integral(PdV)?
On the other hand, if we calculate the Q by Q=nCvΔT or Q=nCpΔT we'd get totally different results.
Constant volume or constant pressure??
In a question I tried to solved: "A house has well-insulated walls. It contains a volume of 100 m3 of air at 300 K. Calculate the energy required to increase the temperature of this diatomic ideal gas by 1.00°C." The solution start with the assumption by...
Yes, I must have skipped the fact that every kinetic energy added to the system must be summed up to get the total. Kinetic energy has a scalar value due to v^2 so there's no such thing as "cancel out" as opposed to cancelling out of velocities.
Thank you.
With that reasoning I was not able to reach the same conclusion-sorry. I always tend to think that slower molecules -which may also mean slower speeds if both gases are the same- will dominate as collisions do occur with each other. But I thought this way: avarege speed is 1.6SRoot(kT/m). So new...
Question:Dalton’s law of partial pressures states that the total pressure
of a mixture of gases is equal to the sum of the partial pressures
of gases making up the mixture. Give a convincing
argument for this law based on the kinetic theory of gases.
Answer to this question from the book I...
I have two questions actually:
1. According to Stefen's Law formula power created by an conventional tungsten bulb can be calculated and temperature of the filament is about 3500 K.
I know it has low pressure gas inside a bulb but doesn't that mean sooner you switched on the bulb the pressure...
Suppose we drop a bottle cork on water. It has a shape similar to -rougly- a pyramid i.e. upper area A1 is smaller than bottom A2. Therefore it's vertically as well as horizontally symmetric.
But as we drop it, it does not stay vertical but horizontal making upside and downside areas (A) equal...