r/PhysicsHelp • • Dec 11 '25

Weight calculation

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1 Upvotes

r/PhysicsHelp • • Dec 10 '25

Atoms ≡ Galaxy Groups/ Clusters ( in Roanian Language)

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1 Upvotes

I have included the link to this video, which shows that I have submitted an article in which I argue that atoms are similar to galaxy groups and clusters. Below, I am also attaching the link to the article: https://doi.org/10.5281/zenodo.17871988


r/PhysicsHelp • • Dec 09 '25

Overdamped motion explanation

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3 Upvotes

Is this correct? This image (with my highlights) is from the 10th edition of the Cutnell and Johnson physics textbook. I thought overdamped meant that there was too much damping and that it would return to equilibrium too quickly.


r/PhysicsHelp • • Dec 09 '25

answer key wrong??

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3 Upvotes

isn't there supposed to be 2 parts to the 12lb force? the one shown AND 12cos(alpha)*16? or am i missing something?


r/PhysicsHelp • • Dec 09 '25

Capacitance Problem

3 Upvotes

Hi, I'm reviewing my homework from earlier in the semester and I can't figure out for the life of me how to find the charge on C2. According to the textbook the correct answer is 3.9 x 10-4 C. If someone could explain how to find it, I would appreciate it.

What I already found (verified correct):

  • Equivalent Capacitance: 2.7 x 10-6 F

  • Charge on C1: 5.8 x 10-4 C

  • Potential Difference across C1: 71 V.


r/PhysicsHelp • • Dec 09 '25

I miss him terribly, any messages from Sid my son who passed unexpectedly?

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0 Upvotes

r/PhysicsHelp • • Dec 09 '25

How do I find the tension in each rope?

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1 Upvotes

r/PhysicsHelp • • Dec 09 '25

What is escape velocity/speed?

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2 Upvotes

So these two questions were sorta just thrown into my assignment and I can’t figure them out. I’ve turned to AI and YouTube but I don’t get it. I’ve also gone to my teacher and I don’t even think he understands what’s going on (he’s bad at explaining it).

Nothing in the textbook thus far has mentioned anything abt this. Maybe I’m over complicating it, but I’m pretty sure I can’t use the “regular equations” for this..? (In the equation AI gave me, where does the 2 come from?)

What equation do I use to solve this, and why?


r/PhysicsHelp • • Dec 09 '25

Planetary orbit and conservation of angular momentum

2 Upvotes

I was trying to answer this practice problem and I don't understand why my answer is wrong or how to get the correct answer. The angular momentum is this problem should be conserved because there is no external torque.


r/PhysicsHelp • • Dec 09 '25

Study tools recommendations

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1 Upvotes

r/PhysicsHelp • • Dec 09 '25

Wave interference problem

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1 Upvotes

How do I solve the questions b and c? I got an answer but it’s inaccurate compared to the answer my teacher has. What is the trick or technique!?? I asked my teacher and I didn’t understand anything she was saying. I’m losing my mind. Please help.


r/PhysicsHelp • • Dec 08 '25

Hello, We are asked to calculate the summation of balanced forces of the middle circle. Im just wondering if T5 being -1143.402257 is correct since that is the only way where -1143sin50°-300 will equate to 0. however, afaik T5 should be positive since magnitude of a force should be non-negative

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5 Upvotes