Homework Statement
An air bubble of volume 1cm^3 is located at a depth of 50m beneath the surface where the temperature is 17C. When the bubble goes up to the surface where the temperature is 27C, how much will its volume be? Take the atmospheric pressure to be 1atm. Assume the pressure...
OK, I think I got it then. So, when considering an agent increasing the potential energy you disregard the work done by the conservative force, and when considering the work done by the conservative force, you take a look at how the kinetic energy changed.
Thanks for clarifying!
OK, so the work done by gravity is actually manifesting in the fact that no KE is gained by the object?
If no net work is done though, how can it be that there's energy gained by the object?
Hello, I got another inquiry about work. Supposing an external agent gives potential energy to an object by pulling it up for instance, he's doing work equal to:
W=mgh_{f} - mgh_{i}
Now, at the same time the Earth is doing the same work, only negative. Only, when the object is let go, it...
Hello, I've been going over work and energy transfer for some upcoming tests, and I got the following question:
http://www.dotcore.co.il/conf1.gif
If I look at that configuration, the ball is moving down the inclined path in the same direction as the x axis, and there's no movement on the y...
Homework Statement
The original problem:
A plane mirror is placed horizontally at the bottom of a transparent liquid of 10 cm depth. When one looks at the image of a small object floating at the surface of the liquid right above the object, the image is seen at 14 cm below the surface of...
Is there something conceptually wrong with option 2?
Let me see if I understand correctly. If the wind has a certain velocity, the resulting velocity of the sound wave is the constant velocity, 343m/s, plus the velocity of the wind. So, is there a reason why option 2 cannot occur?
Hi, I've got a problem that I can't seem to find an explanation to, about the Doppler Effect
An ambulance is going down the road at a speed U meters/second, in the same direction as the wind, which has a speed of W meters/second. The speed of sound in air is c meters/second
Now, I have to...
So, I could also calculate:
w = ΔE - q ?
And could you please explain to me how to use the equation you wrote? What's Pext? How do you integrate it? Sorry, I'm not very good with integrals...
Thanks for the quick reply!
Homework Statement
A cylinder with a frictionless piston is placed horizontally in an atmosphere pressure 1 * 105 N/m2. A gas in the cylinder is initially at a temperature of 300K with a volume of 6.0 * 10-3 m3. Then the gas is heated slowly to 400K. How much work is done by the gas in the...