Recent content by brett812718

Xa+Va t =Xb-Vb t t= (Xb-Xa)/(Va+Vb) would I use this to get the time?

so i guess the answer is no?

1) do the rockets pass each other at a relative speed of .95c as viewed from earth? 2) you should not have to do anythin with time dilation since it is viewed from Earth and not one of the spaceships??

Homework Statement Two relativistic rockets move toward each other. as seen by an observer on Earth rocket A of proper length 500m travels at a speed of .8c and rocket b of proper length travels at speed .6c. What is the speed of the rockets relative to each other? the earthbound observer sets...

F is in the opposite direction of E right?

I am looking for the angle made by F and the positive x axis

sorry the title should have said force on an electron from an elecrtic field

Homework Statement A 17.0 g block with a charge of +1.30 10-4 C is placed in an electric field e vector = (2000 i hat - 200 j hat) N/C. (a) What is the electrostatic force on the block? the force is 2.61E-1N but I am having trouble finding the angle. Homework Equations F=qEThe Attempt at a...

thanks

Homework Statement A charge of 18 nC is uniformly distributed along a straight rod of length 4.7 m that is bent into a circular arc with a radius of 2.4 m. What is the magnitude of the electric field at the center of curvature of the arc? Homework Equations E=KQ/R^2The Attempt at a Solution...

no, it does not say

Homework Statement Find the maximum and minimum values of the function F(x)=ln(x/(x^2+1)) on the interval (0,10] Homework Equations d/dx[lnu]=u'/u The Attempt at a Solution f'(x)=(1-x^2)/[(1+x^2)x] f'(x)=0 when 1-x^2=0 1=x^2 x=1 which is the maximum f(1)=-.693 what do I use...

thanks for the help

web assign said it was correct

F14x=[-kQ^2/(sqrt2)^2]cos45=kQq/1^2 [-Q^2/2]cos45=Qq/1 -Qcos45/2=q -cos45/2=q/Q Q/q=1/[-.5cos45] is this it?