Recent content by famallama

Is it really that simple? there is nothing special about it being in the electrical potential section? If its Uq then is q the charge of the electron? Or do i simply have to find the kinetic energy?

Homework Statement An electron moving parallel to the x-axis has in initial speed of 3.7x10^6m/s at the origin. Its speed is reduced to 1.4x10^5m/s at the point x=2.0 cm. What is the potential difference between the origin and this point? Which point is at the higher potential? Homework...

thank you very much

I have tried that, but the 5 is what is throwing me off.

Homework Statement Evaluate the integral of (1/Sqrt(5x-x^2)) Homework Equations [d/dx]{arcsin(x)}=(du/dx)/sqrt(1-x^2) The Attempt at a Solution arcsine(2x-5)/5 I did end up getting the right answer, but have no idea how I got there.

that doesn't really help. I get x^4 -4(sqrt(4+x^4)) +6 on top of x^4(sqrt(4+x^))-2x^4

Homework Statement Evaluate limit as x approaches 0 of (square root(4+x^4)-2)/x^4) algebraically by rationalizing the numerator. Show details The Attempt at a Solution I rationalized the numerator and i see it as there is a root in the denominator now which is when i was taught to...

limit as x approaches 0 of (square root(4+x^4)-2)/x^4) it says to solve algebraically by rationalizing the numerator