Recent content by yjk91

thank you

Homework Statement difference between convex lens formula and convex mirror formula The Attempt at a Solution for convex mirror you make focal point negative and use the 1/f = 1/do + 1/di but for convex lens do you do the same? you don't make the f negative i think am i...

Homework Statement so if the original object is 4.6 cm tall located at x = 0 and it's a concave mirror distance from C to the object is 16 cm and Radius of the mirror is 12 cm The Attempt at a Solution to find the position of x image i got 9.6 cm then for magnification i...

i got it thanks always helping :)

i forgot square I = I0 * cos(theta)^2 other than that it's right

Homework Statement Electric and magnetic fields in many materials can be analyzed using the same relationships as for fields in vacuum, only substituting relative values of the permittivity and the permeability, ε = κε0 and μ = κmμ0, for their vacuum values, where κ is the dielectric...

Homework Statement Two polarizers are out of alignment by 30°. If light of intensity 3.86 W/m2 and initially polarized halfway between the polarizing angles of the two filters passes through the two filters, what is the intensity of the transmitted light? The Attempt at a Solution Use...

so 40 * .15 * 0.3 X (0.055x + 0.210z) using the cross product i get (0.3 * .21, 0 , -.3*.055) if i add them i get 0.0465 and 40 * .15 * .0465 = .279 N is this right?

F = ILB yeah but B is in x and z direction so do i just do 0.15 A * 0.3 M * (0.055T x + 0.210T z) and then do i square x and z then rad it? i tried that but it's not right

hey Gneli could you help me with this problem? i just need a place to start and some guidance thank you https://www.physicsforums.com/showthread.php?p=3419623#post3419623

Homework Statement A coil of wire consisting of 40 rectangular loops, with width 16 cm and height 30 cm, is placed in a constant magnetic field given by B = 0.055Tx + 0.210T.z The coil is hinged to a fixed thin rod along the y-axis (along segment da in the figure) and is originally located in...

sweet i got it thx

Homework Statement A cube of gold (resistivity ?R = 2.44 10-8 O m, density ?D = 1.93 104 kg / m3, and specific heat c = 129 J / kg °C) that is 3.5 mm on a side is connected across the terminals of a 40-µF capacitor that initially has a potential difference of 340.0 V between its plates...

oh thanks i'll remember

qvB = mv^2/R or R = mv/qB. i'm using this to find the R so 1.6*10^-27 * 5 * 10^5 / (1.6*10^-19 * 0.62 * .62T) and i got 0.008065 m and it's not the answer 5 * 10^5 is the velocity on the xand y axis i tried using the z axis but that's not even close help?