Thanks for your input. The values you gave seem to agree with those I got. It seems I did a pretty stupid mistake, the volume WAS known - I just hadn't noticed it. It was written on the container. Well, the rest of the report wasn't that hard, and I've got it done now.
God, I feel stupid...
Hi all! This what I've done: First I pumped underpressure into a glass container, checked the manometer's reading and then weighed the container on two different scales. Then I opened the valve a bit, checked pressure and weighed the bottle etc. I did this 10 times. So what I've got is 10...
Hmm..I see what mean. Magnetic field lines have such a property that they always form closed loops. So what you want is a bar magnet with field lines emerging from one end and no existing elsewhere near the magnet. I'd pretty sure this can't be done. The field lines must go to the other pole of...
Well, at least plasma interacts with magnetic field so that it could be used for insulating areas from a magnetic field. If there is no magnetic field originally inside the plasma, it pushes all incoming magnetic field lines aside.
Strictly speaking, centrifugal force is a reaction force produced by the body on the rider. The only force acting on a body in uniform rotational motion is the centripetal force. However, the reaction force exerted by the ferris wheel on you makes you feel like you experience some kind of a...
I'd say you're right. Since magnetic flux through the loop is a constant, no emf will be induced. As for the third question: Lanz' law says that the induced emf will be such that it opposes the change that caused it. After twisting my rigth for a while I, too, come to the conclusion that induced...
It is so, because in electrostatic equilibrium there electric field inside the conducting volume is exactly zero. The external field causes the free electrons to accumulate in the surface of the conductor. This causes an internal field of an exactly opposite direction to the external field. In...
This one can be solved using Bernoulli's equation. There might be easier wayto do it, but this how I'd break it down (I suppose you are familiar the equation).
On the left side, there are pressure (supplied by the pump), velocity ( you can calculate by recognizing that A_1*v_1=A_2*v_2 ) and...
The modern method for determining the speed of light was developed by K. M. Evenson et al. It relies on separate mesurements of wavelength and frequency emitted by a stabilized laser. They achieved the value c=2 999 792 458 m/s, which has uncertainty of only 1 m/s.
Theoretically Maxwell...
Thank you for your answer. I've understood that plasma is essentially just loose nuclei (positive ions) and electrons with negative charge (and of course some neutral atoms).
But if there is originally no magnetic field inside the plasma, how can field be generated inside it? Moving a ball of...
I was reading about plasma the other day, and I was really impressed how it interacts with magnetic field. Reasons as to why it behaves the way it does were clearly explained, but I ran into a couple of problems:
If there is a magnetic field inside plasma, compressing plasma also compresses...
First of all, I'm new to this forum, so please excuse any newbie etiquette errors I have made =)
My problem is this: I'm doing a lab report on an experiment where we attempted at measuring the density of air. I won't go to the details, but basically we just measured air on different pressures...