Recent content by splac6996

Homework Statement A 44.0 -turn, 3.90-cm-diameter coil with R(resistance) = 0.510 surrounds a 2.40-cm-diameter solenoid. The solenoid is 16.0 long and has 240 turns. The 60 Hz current through the solenoid is I(solenoid)= 0.530Asin2\pift. Homework Equations Find the value of I(coil)...

[/B]Homework Statement The figure is a cross section through three long wires with linear mass density 43.0. They each carry equal currents in the directions shown. The lower two wires are 4.0 cm apart and are attached to a table. Homework Equations What current will allow the...

A long, straight conducting wire of radius R has a nonuniform current density J=J_{}0*r/R , where J_{}0 is a constant. The wire carries total current I .Find an expression for J_{}0 in terms of I and R .

this is what i think -GM(earth)m(projectile)/H(radius of Earth + distance traveled)=(1/2)m(projectile)v^2 doing the algebra and simplifying i have H=-2GM/v^2 is that correct

Well my understanding is that if the distance is smaller than than the radius then I could use mgh=1/2mv^2 but in this case since the height is going to be largerthan the radius of the Earth so my answer would be wrong.

the speed is defined in km/hr and for the formula that i used I did use a negative sign for my potential energy and I used my zero point to be the point were the projectile is shot from.

Homework Statement A projectile is shot straight up from the Earth's surface at a speed of 1.40×10^4 . How high does it go? Homework Equations potential energy is given by (GM(1)M(2))/R The Attempt at a Solution I attempted to solve this using energy conservation equation and...

well I know that my final time is 3.00s and the final distance I found to be 2.63m. But for my energy equation should equal work

if I wanted to find work by using energy equation what would that look like. The reason i ask is because I should be able to use that equation as well and get the same answer.

I think I can solve this problem now thanks

Homework Statement 650kg elevator starts from rest. It moves upward for 3.00s with constant acceleration until it reches its cruising speed of 1.75m/s. What is the average power of the elevator motor during this period? Homework Equations use either force or conservation of energy...

static friction

Homework Statement A penny of mass 3.10g rests on a small 20.0g block supported by a spinning disk. The coefficients of friciton between block and disk are .750(static) and 0.640(kinetic) while those for the penny and block are 0.520(static) and .450(kinetic). What is the maximum rate of...

I have never seen this technique before is that the only way to do this?

I have a hyperbola with the following equation and I am trying to find my angles to eventually rotate this (conic section), but I don't know what to do because when I follow the standard form of (A-C)/B, I get zero. Is there some trick that I don't know about. x^2+4xy+y^2=12