# Recent Activity

1. ### Asymptotic attached a file to the thread How do I interlock 2 CFL, a buzzer with the opening of door? Read description....

Were you attempting to use the 'media' button from the upper toolbar? Site help indicates media sources are limited to these "approved...

Dec 17, 2017 at 2:50 AM
2. ### FactChecker replied to the thread I Physics, resonance.

The response of a system to different frequencies can be handled separately and summed. It's not clear what you mean by "what is...

Dec 17, 2017 at 2:46 AM
3. ### lekh2003 liked StoneTemplePython's post in the thread Why are technology giants American?.

I feel out of sync with this thread. @jedishrfu In what meaningful sense could Linux (even with massively higher adoption) be...

Dec 17, 2017 at 2:46 AM
4. ### lekh2003 replied to the thread I Physics, resonance.

Hello Danial3333, welcome to the forum. I think you need a little bit more studying to do with frequencies and resonances. Take a look...

Dec 17, 2017 at 2:43 AM
5. ### Bandersnatch replied to the thread You wouldn't treat your friend as you would yourself?.

You're missing on an interesting conversation partner and a good audience.

Dec 17, 2017 at 2:22 AM
6. ### lekh2003 liked haushofer's post in the thread B Is supersymmetry dead?.

Well, this is not the topic to discuss the multiverse, but the plausibility of scientific hypotheses is of course not the same as...

Dec 17, 2017 at 2:15 AM

Well, this is not the topic to discuss the multiverse, but the plausibility of scientific hypotheses is of course not the same as...

Dec 17, 2017 at 2:14 AM
8. ### lekh2003 liked ISamson's post in the thread Newcomer Award.

Thank you! I highly enjoy the attitude and knowledge at PF. This is a valuable resource for everyone with an interest in STEM. Physics...

Dec 17, 2017 at 1:59 AM
9. ### PeroK replied to the thread Special theory of relativity, theoretical problem.

The key word in the question is "proper" time. What do you know about proper time?

Dec 17, 2017 at 1:58 AM
10. ### epenguin replied to the thread Calculate the number of molecules of O2 given moles.

Maybe you have go the question confused with the other possible similar kind of questions. Forget everything you know about oxygen -...

Dec 17, 2017 at 1:55 AM
11. ### Manoj Sahu replied to the thread How do I interlock 2 CFL, a buzzer with the opening of door? Read description....

I have drawn schematic but I am unable to post. It shows error "This forum has disabled media sharing" @Windadct @Averagesupernova

Dec 17, 2017 at 1:46 AM
12. ### PeroK replied to the thread Find speed given mass, starting speed and time.

Not quite. It takes $2.5s$ to stop. So you need to work out the distance covered in that time. Note that because motion is all in...

Dec 17, 2017 at 1:35 AM
13. ### Laurie K replied to the thread Why are there so many computer languages?.

If you are looking at software longevity then software developed in MS Visual Foxpro 6.0, released in 18 May 1998, will still run in...

Dec 17, 2017 at 1:28 AM
14. ### collinsmark liked davenn's post in the thread Lame Jokes.

[ATTACH]

Dec 17, 2017 at 1:28 AM
15. ### vela liked Irissvt's post in the thread Admissions Drop the Physics Requirement to Encourage More Women Engineers?.

Female student currently doing an A Level in Physics in a class of 8 where I am the only girl. Although I don't know enough about what...

Dec 17, 2017 at 1:24 AM