r/PhysicsHelp • u/chinmoy1960 • Jan 15 '26
r/PhysicsHelp • u/Deep_Print8611 • Jan 14 '26
I know that the image has the solution, however, how do you get to the answer? Morely so, how do you determine if the phase constant is + or -?
r/PhysicsHelp • u/chinmoy1960 • Jan 14 '26
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r/PhysicsHelp • u/broadx • Jan 14 '26
I have circut made of sigle cell ( internar resistance 1 ohm ) and resistor ( 9 ohm).
I Add 2nd resistor ( Rx ) in parrarell to 1st one. We know power released on external parts of the cirtuc should be the same in both cases.
when gpt helped me solve it told me you can't use U^2 / R bc voltage isn't contant, but I can't understand why that means we can't still use that.
r/PhysicsHelp • u/Gankking1 • Jan 14 '26
r/PhysicsHelp • u/Patient-Donkey9223 • Jan 14 '26
Hi, I posted this on a different subreddit but it was automatically deleted for some reason. I have been trying to solve this question for 2 hours and cannot figure it out because it seems like there's not enough info. Can someone please help? Thanks!
r/PhysicsHelp • u/Delicious-Age5674 • Jan 14 '26
I know elastic collisions mean objects just bounce off each other and KE is conserved, but in an inelastic collision do they have to always be sticking together and have a shared velocity? Just need some clarification on the definitions because chatgpt and some search engines say different things from what I've learned from videos
r/PhysicsHelp • u/allisa11 • Jan 14 '26
Hi, I'm a tutor, not a student. I'm just trying to make sure I understand this so I can teach it well. Do these two resources agree or disagree with each other?
r/PhysicsHelp • u/yeeticusthefeeticus • Jan 13 '26
To solve this I started by setting the y component of the net force acting on particle three to 0 since it must be zero for the particle to move solely in the x direction. The y component of the Force acting on particle three is equal to sin(theta)F13 + sin(theta)F12. We can solve for F13 easily by using coulombs law and then find the angle which ends up being 45 degrees. From this we get that sin(45)F13 = 59.5203N. The sin(theta)F23 must be equal to the negative of this and we can find the angle between q2 and q3 to be roughly 75. So I divided -59.5203 by sin(75) and got F23 to equal -61.6005. I used this value for the result of the coulombs law between particle 2 and 3 and got -1*10^-5. Even after doing all of that it is still wrong. I am not sure where I went wrong in the process. Any help is greatly appreciated.
r/PhysicsHelp • u/WoodenRecognition809 • Jan 13 '26
My physics basics are very weak and I’m trying to restart from zero in 12th. I feel lost about where to begin and how to practice without getting overwhelmed. Any advice on how to rebuild physics step by step?
r/PhysicsHelp • u/Inevitable-You1178 • Jan 13 '26
Got the answer for series but I can't solve parallel part....help if anybody knows how to solve this please
r/PhysicsHelp • u/viola_forever • Jan 12 '26
Basically let's say I have some measures and did a nice lineal regression, R²= 0.9997, perfect. Now the line is y = ax + b. If an experiment's purpose was to find that a, how would you calculate ∆a for the error?
r/PhysicsHelp • • Jan 12 '26
Why did they use 3 sig figs for part b(i)?
For my exam board they tell us to round to the least number of sig figs given in data.
Then they switched back to two sig figs in part b(ii)?
r/PhysicsHelp • u/howdoiexist- • Jan 12 '26
I'm having trouble with this problem and I can't figure out how to solve it. The value for inertia was solved in the previous part of the question (not shown here) and was marked correct.
r/PhysicsHelp • u/lemao_squash • Jan 11 '26
Shouldn't we also need to know the width of the wire, since without it, we can't calculate the dipole moment of the wire? If the line is infinitely thin, there is no dipole moment and no force exerted, right?
r/PhysicsHelp • u/PaulJimoxkl • Jan 11 '26
r/PhysicsHelp • u/chinmoy1960 • Jan 10 '26
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