Recent content by btpolk

I'm currently building a robot using Lego Mindstorm with an ev3 brick that will follow a pre-determined path (marked by black tape), maintain a certain distance behind another robot, and coming to a stop at the end of its journey. The ev3 will be connected to 2 DC motors, 3 light sensors, and an...

Is the "M" in the Schwarzschild radius formula represent the same thing as the "M" in the escape velocity formula?

Homework Statement Determine the escape velocity of a planetary body that has a radius 5 times greater than its Schwarzschild radius. Homework Equations Schwarzschild radius=(2GM)/c^2 escape velocity=√(2GM/r) The Attempt at a Solution v=√((2GMc^2)/(10GM))=√(c^2/5) Is this...

Thanks for the help! I really appreciate it

5V1=V2 V2=12500V P=I2V2 I2=1/125 A Is that right?

Sorry, I did mean 2500V. So to find the current I would use P=V1I1 which would mean that the current would have to equal 1/25 A

i mean 2500W since its per loop

So it would be 25W then?

Homework Statement The primary coil in a transformer has a power of 100W. The flux through a single loop in the primary is changing at a rate of 25 Wb/s. The primary has 100 loops and the secondary has 500 loops. Assuming a perfect transformer (no losses), determine the current and...

That said, I'm guessing I would treat the wire as a cylinder and the limits of integration would be 0 to 2pi? Also where does the J come in? Would it be some kind of substitution for I?

Homework Statement Use Ampere's Law to show that the equation for the magnetic field inside a current carrying wire is (1/2)μJr where J is the current density (assumed constant). Homework Equations ∫B*ds=μI The Attempt at a Solution ∫B*ds=μI B*ds=B(ds)cosθ I think θ...

I do realize that it won't do a lot of damage, if any, but I do have to prove it mathematically.

I'm not sure I understand. So can I use this to prove that the penny can't exert that much force?

If I do that I get 1.7e-4 m, but how does that help me find how much the penny is sinking in the skin?

Of course! Simple mistake. Thank you cepheid for your help! My professor said I would have to make a number of assumptions in this problem, and I imagine the location of the point of contact on the body is one of them.