Recent content by Astraithious

Homework Statement Find the domain of this function and check with your graphing calculator: f(x)=(1+cosx)/(1-cos2x) Homework EquationsThe Attempt at a Solution i get to (1+cosx)/(1+cosx)(1-cosx) which is factored. so then setting each one to zero one at a time i figure out that cosx = -1 and...

thank you everybody this was a great relief

Homework Statement Write F(x)= x2-5|x| as a piecewise function Homework EquationsThe Attempt at a Solution I was writting it out and came to Fx= x2-5(x) and x2-5(-x) but my book says that it comes out to be x2-5 x2-5(-x) I imagine there is a very simple reason why the x in the first one...

Haha I did however I did 0.04 = I 0.065x25x0.15, not 0.04 = I 0.065x(25x0.15) Thank you so much lol, i knew it was simple but it was killing my soul with frustration

Homework Statement A coil of 25 turns of wire is suspended by a thread. When a current flows through the coil, the tension in the thread is reduced by 4.0 ´10-2N. http://members.shaw.ca/barry-barclay/Self-Tests/test11/Magnet20.gif Homework Equations F=IBL B=nμI[/B]The Attempt at a Solution...

thank you very much, so i got. area under curve = 200 number of time intervals of that total = 4 200/4=50 50*0.04= 2 2/0.057=35.08 35.08-24=11.08 11.08*0.057=.632 is this what you meant?

Homework Statement A 0.057 kg tennis ball moving west at 24 m s is hit in the opposite direction east with a tennis racket. The force acting on the ball during the hit is shown in the graph below. What is the magnitude of the final momentum of the tennis ball? A. 0.63 kgm s B. 1.37 kgm s C...

I gave up trying to talk sense into her, its an online course to upgrade and I suppose the one mark is fine. She couldn't justify her answer she just said that's the answer given. thanks anyhow everybody

Definitively no, but I know that to me and everything else I read about this problem says it expands and I agree. I would like to know why my teachers answer is not correct. My only guess for this is the the movement is in the direction of the of the magnetic field and it should be parallel...

Homework Statement There is a counterclockwise current I in a circular loop of wire situated in an external magnetic field directed out of the page as shown. The effect of the forces that act on this current is to make the loop Select one: a. expand in size X b. contract in size c...

I just redid my values and it was a calculator error, my q is now 1.759 x 10^8 which is a great deal more. i end up with a final electrical force of 2.8 x 10^26 n but the ratio seems off shouldn't it be 4.1 to 4.3 x 10^42 : 1 with my electrical force i just can't get that ratio , thoughts?

for k i used 9.0 x 10^9, I used constants from our information given but mass of an electron was from elsewhere. I am not sure what step was incorrect or if i need to even find the total charge in 1g of electrons then plug those into my equation. I tend to make things too complicated

Homework Statement Imagine you could place 1g of electrons 1.0 m away from another 1g of electrons. calculate the electrical force and gravitational force between them. Homework Equations fe= kQ1Q2/r^2 fg=Gm1m2/r^2 The Attempt at a Solution So the number of electron is N= 0.001 /...

Sorry for the late reply and no i have't yet. first is vpw = speed of wind and vwg is velocity of the plane with respect to the wind

Homework Statement A pilot points an aircraft due west, while the wind blows towards the NNE (45 degrees north of east). The resultant velocity of the aircraft over the ground is 64 m/s, 25° N of W . (a) At what speed does the wind blow, and (b) what is the speed of the plane with respect...