Answer:
The final temperature will be 3600 K.
Explanation:
Side 1
T=927°C
T=1200 K
Lets take volume of one side is V then the volume of other side will be 2V. The final volume of system will become 3 V.
The system is closed so the mass of system will remain constant .
We know that for ideal gas P V = m R T
The final pressure is same as initial pressure so we can say that
So the final temperature will be 3600 K.
Answer:
f = 91.1 Hz
Explanation:
As we know that it is given here that wavelength of sound in platinum is same as the wavelength of sound in air
so we can use the formula of wavelength in two mediums
now it is given that
frequency of sound in platinum is 750 Hz
now frequency of sound in air = f
now from above formula
Hey! I empathize with you, as I just started the energy unit in physics as well!
Alright, lets list what we know, and which equation(s) we need.
PE = Gravitational Potential Energy
m = mass
g = gravity (9.8 m/s^2)
h = height
Guess what?
We need to find the height!
Lets make this more organized:
Known:
m = 40 kg
PE = 14000
g = 9.8 m/s^2
Unknown:
h = ?
================================
Now, if we take a look at the equation PEg = mgh, you will see that we have everything besides the height! So lets solve for the height by substituting in for the variables we know:
14000 J = 40 kg * (9.8 m/s^2) * h
40 * 9.8 = 392
14000 J = 392 * h
14000/392 = h
35.71 m = h
There we go! If you simply list what you know and don't know, you will find the equation you need to solve the problem.
Have a great day and good luck!