Recent content by jreelawg

Ok. Thanks haruspex. I guess I'll put this problem to rest for now.

So kinetic energy is lost to thermal energy. 1/2(mb)V0^2 - 1/2(mb + mp)V1^2 = Eth ? = 37.9634 J = fk (.02) = n * Uk uk = (37.9634/.02)/n = 1898.17/n So is n really just the (mb)g?

Could this be solved using the work kinetic energy theorem?

I accidentally used .01 instead of .1 for mass of bullet in my calculation. Here is what I have. I'm especially unsure about the validity of the last part. v1 = velocity immediately after collision v0 = initial velocity of bullet mp = mass of pendulum = 5 kg mb = mass of bullet = 0.1 kg y...

Homework Statement A bullet collides and embeds itself into a block hanging from a rope. The block and embedded bullet swing out to an angle of 10 degrees. If the bullet plows 2 cm into the block before stopping, what is the coefficient of kinetic friction between the block and the bullet...

It's sort of interesting. The perimeter of a digital circle is 8r, and the surface area is approximately 6pir^2.

Pi does = 4. Don't you understand relativity? Curvature affects the metric and makes distances seam shorter. Sure a circle appears to be 3.14... because the circle is experiencing curvature. In the frame of reference of the square, pi is 4.

With the pendulum blocked, he hits the ball ten times. With it unblocked he hits it five times the first round, and 6 the second round. You could try and push a large boulder ten trillion times without budging it, yet move the same boulder with one push a fraction of the net force of the ten...

The singing rod only demonstrates the possible feasibility of something like what he created. It's really a very different thing though. It's hard to compare the two. The strings being mounted on both ends must dampen the strings so that they don't ring out like the singing rod. Instead of...

Your first post was an attempt to debunk the idea that this instrument utilizes transverse vibration of the strings to make it's sound. Almost all of your red flags from that post are completely invalid because the claim is that the instrument utilizes longitudinal vibrations of the strings...

That is a bit of an exaggeration, but I think people know what he means. I think it's cool. If someone refuses to believe it's an actual instrument when it is, it's got to be awesome right!

Is it a coincidence that those HANG instruments are shaped like flyer saucers?

The West has had it's dark days Religion. It has been used as the basis for sub-human treatment of women, people of certain other religions, race, etc. Some parts of the world have become mostly free of the oppression religion can impose. But some parts of the world are still in their dark...

It was a joke, although I do think that it's ridiculous to say Mayan Indians, unless your talking about Mayan Indians.

The guy in that clip makes a fool of himself though in the first 3 or 4 words. "The Mayan Indians", he says? Wrong continent buddy.