Recent content by Prometium

Ok, I didn't think of when the axis is tilted, sounds complicated. Thanks for giving your opinion about this.

Ok, I was thinking that the centripetal force was WITHIN the cable tension; but only a part of. I'm imaging that the rope is doing two things; 1. Holds the basket up, straight vertical; gravity force. 2. Holds the basket within the circle path, straight horisontal; centripetal force.

I have another conclusion that I have never read anywhere, but just thinking of: It must be an equilibrium between gravity and centrifugal force, as well as equilibrium between centrifugal and centripetal force. If we focus on the former, it must be that the gravity takes down the force that...

It was supposed to mean "revolutions per seconds". In fact, I have always believed that RPM on the motorcycle and cars meant rate per minute, but I did just learn that it means revolutions per minute. English is my second language.

Homework Statement The soluble problem We have a disc, horisontal, which is rotating 0.5 revolutions per second. A block is placed on this disc with the mass 0.6 kg and 0.2 meters from the shaft. First, I convert 0.5 rates per second to T = 2 seconds. w = 2∏/2 --> w = ∏ --> m = 0.6 kg -->...

Yes, of course I forgot that air resistance is involved. I think it wasn't the point in my task, but I will mention it. Another thing I was thinking of was that - as you said earlier - centripetal force is only a resulting force.

Homework Statement I'm supposed to give the three forces acting on the basket on a carousel. Homework Equations Principly not for this task. The Attempt at a Solution When I look at the forces on the baskets on the carousel in constant rotation, I can point out the three...

Yes, was pretty sure about that in your latest post, when it was γ. I was more asking idiot safe, to be absolutely sure. Thank you very much.

Thank you for sharing your knowledge. I'm beginner in relativistic physics, and my teacher explain bad. In my E-mail contact, the teacher tells me "use this relativistic mass in the equation for velocity". I was confused. In found it therefore correct to use 9.1093826*19^-31 kg as the only...

I understand, there is a clear difference between m and m0. In my book, I was copying the formula Ek = (mc^2) / ((1-v^2/c^2)^1/2) – mc^2 And this is exactly how it was written. From Ek = E – E0 I did suppose that this is the same relationship as Ek = mc^2 – m0c^2. I would therefore like...

After som trying to plug in the relativistic mass in the formula Ek = (mc^2) / ((1-v^2/c^2)^1/2) – mc^2 I only came to the result 1, and does not work. I understand it as this formula does in itself count the relativistiv mass from rest mass automatically. So, I do believe that the...

Now, the thought hit med that maybe I was supposed to base the counting on tha relativistic mass I counted in previous task?

Thank you. I was suspecting this attempt being wrong. Ek = E – E0 = (mc^2) / ((1-v^2/c^2)^1/2) – mc^2 (Ek + mc^2)*((1-v^2/c^2)^1/2) = mc^2 1 – v^2/c^2 = 0.6994906196 v^2 / c^2 = 0.3005093804 v^2 = 2.700979513*10^16 v = 164’346’570.2 m/s This is also 0.5481873588 c...

Homework Statement Electrons are accelerated by a potential difference of 0.10 MV. Determine: a) The mass an accelerated electron b) The velocity of an accelerated electron The mass of the electron has been successful determined, which I give here. I was doing wrong when I was...

Homework Statement I think I'm very right om this assignment, but I would like to completely sure - so I'm thankful if someone educated in nuclear physics can check that this is correct. 226-Ra has a half-life of 1600 years. One source of radiation contains 1.0 mg of this Radium nuclide...