help Definition and 28 Threads

TL;DR Summary: Hey every body i need some help. Hey every body i need some help, I just joined in physic univerity, and my probleme is a math problem. We do geometrical optics and i'm very bad for demonstration cause my bases is very limited. I never made trigonometery, derived a function...

I am trying to create a reasonably self sustainable watering system for the plants on my work window sill. Currently I have a 12L bottle (half empty) which (via wicking/capillary action) is watering x2 tomato plants, x1 courgette plant, x1 sweet pepper plant, and it is all going very well...

Hello, I have posted a homework help request and subsequently documented my attempts to solve it, in two further replies to it. I have replied to my original request because after some time the original post was no longer editable. But now it appears that my help request has already two replies...

hi so im scrolling on tiktok and come across a video about debloting device and then i follow the tutorial first i download shizuku and next is canta, so i connect the shizuku app and head when its connected to my phone i went to canta and deleted everything i see,i mean everything i delete...

TL;DR Summary: How should I study for the F=ma competition as a total newby to competition physics? Hi, next year I'm hoping to do the F=ma physics competition. I wanted to start preparing beforehand so Im not too panicked a day before the competition. Does anybody with experience in this...

spice does show a different ripple voltage than the one calculated using spice I load or Vdc load and Req and C. spice shows a ripple voltage of about 31mV, but calculating the ripple with the formula i get 38mV wich is really weird. as you can see in the photo i get a dc output voltage of...

Hello, I'm a biology student, that hopes to find some help from amazing people of ot forum. Perhaps one day I will be ablo to help others aswell.

TL;DR Summary: problem help pls :( so i have a presentation competition on physics. and I chose the energy mass equivalency topic. while researching, I came across a video stating that if we compress a spring, it's energy increases, so it's mass also increases. same thing with a cup of coffee...

Hello, I am an undergraduate physics student, and I would like some guidance on 'what to do' once I finish my degree. Any suggestions?

I’m a junior in high school and I’m going to be entering the science fair. I want to do something impressive with a chance of progressing to the state level(CA). I want to try involving ionic thrusters but the i’m having trouble finding an actual hypothesis or independent variable to test. Can...

This is page 73 of the book. As you can see, the mixed derivatives with the affine connections vanish in the second term. Why does that happen? This is used to prove that the connections are not a tensor, and i figured you could also reason it out even without making those terms vanish. OBS...

I would like to thank those who have helped me in recent months to understand something about theoretical physics. My 25th goes to you too. Thanks guys. I owe at least 5 points to you. :heart::heart::heart:

TL;DR Summary: Need ideas on how to get maximum weight/resistance out of a pulley system in a centered axis extension machine Hi so I am studying mechanical engineering and am currently working on a factory that makes gym machines, and I wanted to know if anyone could explain to me how I could...

I can use the "Reply" option when I copy someone's text and it appears. However, when I choose the "Quote" option upon copying, maybe the text gets copied but nothing appears. Can someone tell me how to use the "Quote" option on here? Many thanks.

Idk

I'm leaning towards the same, or maybe increase. I actually have no clue.

Hello, I needed help with a physics problem and I found this forum. I hope someone can help me with my problem.

i do know how to do the working but i dont understand the concept stated above...

Exactly what it says T-T

The Question What I did The Answer

I was looking for some mcnp6.3 command instructions and I thought to tip my questions on internet. As my previous job taught to me, great people are always available on scientific forums for helping you! It's amazing!

Question: My answer: The books answer:

Hi. My story is weird and I need help. Brief backstory: I'm 21 and my brain is completely empty. As a kid, I didn't realize how interesting it was to do science and learn about anything, so I was weird. I'm the same way now. I can talk and talk endlessly about some unusual and difficult topic...

Here's the answer: Could you explain the highlighted part for me? Thank you very much!

HI, I need help wtih my physics work and dont know where to ask

I don't get the step from (3-22) to (3-23), can you how this integral was calculated? Thanks! Below there is a screenshoot of (3-9). Images are taken from "Intermediate Quantum Mechanics, 3rd Edition - Bethe, Jackiw".

hello all. Most the time im pretty good at analyizing data, but today i am struggling. So i need some extra help. I used a open source program called openFAST to generate this data. openFAST is a wind turbine simulation software. The graph below is of the a time series calculation from a...