Recent content by nabilsaleh

I'm having a trouble doing this kind of problems :S Lets try this for example: The joint p.d.f of the continuous random variable X and Y is: f(x,y)= (2y+x)/8 for 0<x<2 ; 1<y<2 now we're asked to find a probability, say P(X+Y<2) I know i have to double integrate but how do I choose my...

Homework Statement For the circuit in the link below, find C equivalent: https://picasaweb.google.com/lh/photo/-p0vPLyvxZ_W_sXiWEIikDlT_BqmZyKP1qROOFyElOQ?feat=directlink Homework Equations The Attempt at a Solution I tired many ways to solve this but the middle branch...

i'm substituting the numbers into the equation but I'm getting results that has nothing to do with the given range :( PLEASE HELP! at least show me how to get one of the wavelengths!

but I have water AND oil ,, I've never done a problem like this ... it's confusing which index to use and when to use it.

Homework Statement A 360 nm thick oil film floats on the surface of the water. The indices of refraction of the oil and the water are 1.50 and 1.33, respectively. The surface of the oil is illuminated from above at normal incidence with white light. The two wavelengths of light in the 400 nm...

Homework Statement A 360 nm thick oil film floats on the surface of the water. The indices of refraction of the oil and the water are 1.50 and 1.33, respectively. The surface of the oil is illuminated from above at normal incidence with white light. The two wavelengths of light in the 400 nm...

Homework Statement An insulated Thermos contains 130 cm3 of hot coffeeat 80.0 degrees C. You put in a 12.0 g ice cube at its meltingpoint to cool the coffee. By how many degrees has your coffeecooled once the ice has melted? Treat the coffee as though it werepure water and neglect energy...

i tried integrating (w= (integral) fd ) and i got x=9.7 PLEASE CHECK MY ANSWER! this is important!

i did. but can you elaborate please. I am having a hard time following you here :S

obviously the force changes according to displacement. but how could a=f/m benefit us? i didn't get where you're trying to get with this...

no the force is not conservative. so do we use f=ma? but in that case wat is a ?!

positive...so?

negative acceleration, right?

Homework Statement The only force acting on a 2.3 kg body as it moves along the positive x-axis has an x component Fx = -3x N, where x is in meters. The velocity of the body at x = 2.8 m is 11 m/s. (a) What is the velocity of the body at x = 3.6 m? (b) At what positive value of x will the...