Recent content by TheTank

Did no one come up with a solution to the problem? I am trying to solve this problem as well.. My book says the answere should be, if the velocity of the cylinder (c.o.m) is v, then it will have a new velocity v' = v/3 (1+2cos(angle of impact)) shortly after impact. Hope this helps someone to...

Homework Statement I used Lagrange to solve a problem and ended up with two differential equationsHomework Equations m_2x''+(k-m_2 {\theta '}^2)x=k(L_o+L_2/2)+m_2 g cos{\theta} and (I_1 +1_2 +m_2 x^2) {\theta}'' +2m_2 \cdot x \cdot x' \theta ' +(m_1 L_1/2 +m_2 x)g sin\theta =0The Attempt at...

No, the second equation is q + q' = 10^-5 C..

No then you would be cheating nature. When u have an equation with 2 unkowns, u need 2 equations to solve. If u have 3 unkowns, u need 3 equations etc...

I have to agree with you ofcourse, but the book says that α>θ.. Either way, it seems that strange things happens when the angles are close to 90 degrees. Yes, but if I have that extra term in the equation for the x-direction then I get dp/dx=0, which supports your theory that the pressure...

Yes, that's why I post the problem here, exactly because I think it seems strange that when \theta=45 then \alpha=90.. I suspect maybe my equation for the x-direction is wrong?? α is the angle between a pressure surface/line in the water and the ground floor (not the inclined). Yes if there...

I have added a picture of the problem with an attempt for a solution. Please let me know if its right or wrong, and what I have done wrong if its wrong..

I have 2 questions. I have been thinking about these two things a while, and got no one to ask, so hope to get some info/answeres here:) 1: When an electron is standing still, it produces an electric field (and no magnetic field), right? So when many electrons is moving with a constant...

Thanks :) appreciated!

The odd thing here is that one of the blocks will get a higher end temperature. Maybe if we imagine two Carnot engines working between the cold and the hot blocks? So that we can say that change in entropy S is zero. I can't get the "correct" answere either. Hope for more response. Thanks

Anyone?

Homework Statement Hope to get a little help here.. 3 identical blocks with constant heatcapasity have temperatures T1, T1, T2, with T1>T2. What is the highest possible temperature T we can achive in one of the blocks, when no heat/work exchange with the envoriment. Answere...

A boat is jet-propelled by a pump that develops a volume flow rate Q and ejects water out the stern at velocity v'. If the boat drag force is F=kv^2 where k is a constant, develop a formula for the steady forward speed v of the boat.