Recent content by Nitrag

Thanks, there seems to be good information on this!

I have a project where I need to research and report on an Electrical Engineering malpractice. Basically, where the engineer faulted the design. I can't find anything with any amount of information. Anyone have any ideas or topics? I was thinking of the California blackouts but there isn't...

What is The amplitude of the sound if the speakers are placed side by side? A = 2*a*cos(\Delta\Phi/ 2) The amplitude has its max value A=2a if cos(\Delta\Phi/2) = +/- 1. This is not the case so take a out. 2*cos(\Delta\Phi/2)=.765 Something a friend told me that's a little clearer to me and...

Calculation error, sorry. Mods you can delete.

Problem 13.30 A thin, 60.0g disk with a diameter of 7.00 cm rotates about an axis through its center with 0.240 J of kinetic energy. What is the speed of a point on the rim? Homework Equations m=.06kg r=.035m KE=.240J The Attempt at a Solution K=(1/2)*I*(w^2) I=(1/2)*M*R^2 I'm using the...

ah, I see the connection now. thanks for the help!

Yes, I got 1.35 J also but it is not correct.

Just mv^2 does not work.My buddy has a different values and he got 0.443 for the question: A 500g, 8.0-cm-diameter can rolls across the floor at 1.0 m/s. What's the can's kinetic energy.

Oops sry, I = (.5*m*r^2)

A 500g, 8.0-cm-diameter can rolls across the floor at 1.0 m/s. What's the can's kinetic energy. I solved this using: K = \frac{1}{2}*I*(\frac{v}{r})^{2} and for some reason I get 1/3 the answer. So I multiplied it by 3 at the end. Is there something wrong with the formula I'm using...

A girl of mass m_G is walking up a slippery slope while pulling a sled of unknown mass; the slope makes an angle theta with the horizontal. The coefficient of static friction between the girl's boots and the slope is mu_s; the friction between the sled and the slope is negligible. It turns out...