Recent content by violin_writer

Tell me if I'm mistaken but that's... the equation squared plus its derivative squared... right sure making sure.

Homework Statement This is another problem my teacher game me. Given the Polar function r=6*sin(t/2) where the variable t is the angle theta in radians, and that t is between 0 and 2*Pi inclusive. Find the distance around the perimeter of the graph. Hint: this is arc length , round to the...

thanks dude that was it... right there. It's funny how something small like that can effect something.

I used solver on my calculator (ti-84)... it's the only way we've gone over. For some reason it either gets overflowed, or iteration errors. The only way that seems to work is by giving a 95 for a. Basically I did what was shown... I set the equation equal to zero & used the "solver" command...

Ok so I looked it over... could it y is wrong. That that is an invalid equation? Is what I started with not the "hyperbolic centernary equation"? Thanks 4 helping... but I need more help

Homework Statement [FONT="Georgia"]I appologize if this is in the wrong topic. But, I need help with the. I know you guys don't exactly give out the answer, but I'm looking for a particular rule of something that will help me. My calculus professor told me to use any available resource to...

I wander... which would require more energy, to decompress air like a vacuum or compress air?

cool... I think you just tell them to knock the burr off, because when a blade has a burr it's as sharp as it can get. At least that what I saw in "how it's made" or a show like it with kitchen knives.

Sharpness I don't think can be quantified. However, you might would want make a prototype and check how well it holds it's sharpness--- that is the true test.

I believe I've heard of this before. The best steel blades are melted and folded... melted and folded--- look at the samurai blade. What you said sounds right, just make sure have some sort of edge to begin with. I think I the actually cut the burr off with another knife if I remember correctly.

[FONT="Book Antiqua"]I did some reading... and decided to make a system of nozzles throughout the RC ducted fan system. I figured I would use a small intake, to vacuum in air at a high rate of speed. Then, I would create an internal nozzle, compress the vacuumed air by ramming it. The fan that...

Hello, I need figure out the torque is required to spin a fan blade at a certain speed. I know it doesn't particularly matter how big the fan is, but how heavy it is. I know a 1gm fan is much easier to turn than a 2gm fan. Can anyone help me?

--- I read it over and I agree... lol! Never would have thought of that though, a wind tunnel with plexiglass and a leaf blower. I didn't mean "wind tunnel", wind tunnel. sorry. I meant the duct around the fan. I think the "drag" or "lack of efficiency" comes from air intake. It's because the...

--- I read it over and I agree... lol! Never would have thought of that though, a wind tunnel with plexiglass and a leaf blower. I didn't mean "wind tunnel", wind tunnel. sorry. I meant the duct around the fan. I think the "drag" or "lack of efficiency" comes from air intake. It's because the...

Yes! There are still people who are talking here! Ok, for those who don't know... I trying to make something similar to a cold jet. Problem is, I haven't an inkling about physics. Can anyone help or show me to look for a calculation? I need to find a out what size fan would be efficient...