Recent content by jrzygrl

Okay, I finally got it now. Thanks a lot!

I figured out part a, but part b is confusing given the problem. I found a formula in my textbook about potential difference between the two capacitor plates as: V = Ed. However this cannot be found as E and d are not given in the problem. I also know that V = Q/C, but capacitance is unknown as...

a) +/- 666.67 as answers for the problem when changing the charge. They were both incorect. b) I based it off the formula PE = .5QV

No, it is the change from where the mouse orginally started (-2m, .5m).

Homework Statement Near the surface of the Earth there is an electric field with a magnitude of about 92 N/C directed vertically down. Assume this field is caused by a net free charge on the Earth. (a) What are the magnitude and sign of the charge on the total Earth that produces this...

The first component is the x and the second is the y. I'm assuming the path the mouse took was a straight line so basically you compare the points in terms of change in x and change in y. How much did the mouse move in the x direction to get to point C? How much did the mouse move in the y...

Homework Statement Professor Milly Coulomb finds it takes 3.0 J of work to drag, at constant speed, a -9.0 mC charge between the plates of a parallel plate capacitor. (a) What is the work done by the electrical force in taking the charge between the plates? (b) What is the potential...

thanks a lot guys i found the answer!

Homework Statement A jet fighter in level flight passes directly overhead at a speed corresponding to Mach number 1.29. The sonic boom is heard by you on the ground 11.9 s later. What is the altitude of the plane? Assume (unrealistically) the speed of sound does not change with altitude...

Homework Statement A solid student in the shape of a rectangular parallelopiped of dimensions 28.0 cm x 19.1 cm x 2.000 m floats horizontally in a calm hot tub filled with warm water; 3.17 cm of the parallelopiped (along the 19.1 cm side) is above the water surface. Find the average density...

thanks a lot! i got it now

Homework Statement The well-known civil engineering firm of Rivers, Rhodes, and Waters is designing a walkway that is to be suspended by means of four steel rods of diameter 2.0 cm and length 2.80 m. The stretch of the rods is not to exceed 0.46 cm under any circumstances. What is the...

ohhh, that's what was wrong. thanks a lot! :smile:

Homework Statement A vertical water pipe extends from the bottom to the top of the World Trade Center in the Big Apple (New York City), a distance of about 420 m. Calculate the difference in pressure in atm between the bottom and the top of the water pipe. Homework Equations p(y) = p -...

thanks i understand the problem now