Recent content by dinhjeffrey

Homework Statement #56 Homework Equations index of refraction = sin(Θincident)/sin(Θrefraction) The Attempt at a Solution yeah i think Θincident is 30 degrees but i don't know how to solve for Θ of refraction. sorry, my teacher didnt teach me optics yet, and she assigned problems...

oh cool my teacher showed us this in class too! lool

thxthx i understand it now ^^

ohh okay i got it. i was confused because i used the direction of current for the first vector instead of velocity.thanks, i like how you answer all my questions ;DD

Homework Statement #32 Homework Equations faraday's law of induction The Attempt at a Solution umm i don't really understand this concept:frown: so here's my attempt. the answer is C so is it because if you have a wire within a wire and the current of one wire is going one...

okay so i applied the right hand rule: thumbs pointing to the right because current is to the right fingertips pointing into the page and my palm(force) is pointing up but since its negative force would be going down?

Homework Statement #30 Homework Equations right hand rule #2 The Attempt at a Solution when i did it, i pointed my thumb to the right, because the current is going to the right. and when i wrapped my hands around the wire until i reach the electron, i go the magnetic force going...

ohh okay got it thanksss! :approve:

would average force be 1 since its in the middle? o.o

v/t = a so v/2seconds = 1 v = 2 m/s ?

F= ma, so Force is 2 mass is 2kg, (given) plug in equation 2= 2a a=1 right?

yeah i was confused when i googled it because i thought electrostatic energy isn't the same as electric potential energy. oh okay i think i get it. is it because PE=-qe⌂x, so if you increase distance, PE(electrostatic energy) increase too?

i don't get to find force from [1,2] and [4,5] actually i think i got more confused now >< do i have to find the total acceleration then plug it into v= v(i) + at? or does acceleration = increase in velocity? is increase in velocity mean the rate of change of velocity or the difference...

hey this is off topic but how do u post the image?

umm do we increase temperature? i am really bad at physics ><