Recent content by pringless

A positive test charge is placed at the center of a spherical Gaussian surface. What happens to the net flux through the Gaussian surface when the surface is replaced by a cube of the same volume whose center is at the same point? or When the sphere is replaced by a cube of one third the volume...

It's correct. Thanks a bunch Doc.

hah oh right..forgot thanks for ur patience and help doc, ill reply back to tell you if the answer is correct

for the part where you showed the y component do you mean sin45 or is it really cos45?

Three identical point charges, each of mass 140g and charge +q, hang from three strings. If the lengths of the left and right strings are each 10 cm, and each forms an angle of 48 degree with the vertical, determine the value of q.

this is my view of it. A+ B+ C- D+ F_ad = kqq/R^2 F_dc = kqq/R^2 F_bc = kqq/(sqr(x))^2 [x = distance of side of square] F_bc_x = kqq/(sqr(x))^2 * cos45 F_bc_y = kqq/(sqr(x))^2 * sin45

The electron gun in a televeision tube is used to accelerate electrons (mass of 9.10939 x 10^-31 kg and charge of -1.60218 x 10^-19 C) from rest to 2 x 10^7 m/s within a distance of .053 m. What electric field is required?

F_db*cos45 and F_db*sin45 ?

i keep getting it incorrect i would use cos45 for the x compoenent and sin45 for the y right? then i add those components to the other two magnitudes?

i think i have the directions correct, how do i add the vectors here?

how do i receive the attachment?

im not sure what u mean this is what i tried i found the magnitude of each vector using kqq/r^2 then i squared all 3 magnitudes and added, and then took the square root. but its wrong. what can i do?

Four point charges, each of magnitude 12.92 x 10^-6 C, are placed at the corners of a square 65.5 cm on a side. Given K_e = 8.98755 x 10^9 Nm^2/C^2. If three of the charges are positive and one is negative, find the magnitude of the force experienced by the negative charge. Answer in units of N...

Suppose that the strength of the electric field about an isolated point charge has a certain value at a distance of 1 m. How will the electric field strength compare at a distance of 2 m from the point charge? i think the field strength will be 1/4 at twice the distance. am i correct?

rocket propulsion/momentum A 1520 kg rocket has 4860 kg of fuel on board. The rocket is coasting through space at 94 m/s and needs to boost its speed to 348 m/s. It does this by firing its engines and ejecting fuel at a relative speed of 807 m/s until the desired speed is reached. How much fuel...