# swaha

Senior Members

159

1. ## What is more "real" - the retarded or instant data?

the instant data can be taken from both reference frames. there is no c in any of them hence both are equally real. just depends on the observers' choice of rf.
2. ## Moving in a lift and gravity. Yes the classic question but I can't understand

1. The blood would pool around the legs because of gravity, but my question is aren't we overcoming the gravity force to go up, why would it affect us? Ok the explanation is that upward force from the lift is not acting on the body. But if we are moving up how come it doesn't affect us. which force doesnt affect us i didnt get. 2. Ok what about lift moving down, why don't we feel any weight? Ok the explanation is we are moving with gravity, but if the lift is not accelerating at 9.8 ms2 we should feel the gravity right. who said we dont feel weight we feel lighter if the lift is ac
3. ## in search of a gravitational understanding

mass is what matters in gravity not spin. dont know about the 3rd.
4. ## Physics Questions

thanks i got confused..........
5. ## Help with experiment...

use the baloon & dont allow the co2 formed to escape.
6. ## No 'ether'? Then how...

if space is not nothing then what are its properties?
7. ## 2nd law of thermodynamics

i havent done statistical mechanics yet so pls explain
8. ## swaha    ajb

what is this resident expert u have under ur name?

9. ## How big is the universe?

thanks brother mickmeister.
10. ## 2nd law of thermodynamics

but why cant it be just equal? over unity wont be possible for it would break energy conservation law.

pls explain.
12. ## How big is the universe?

yah but how did theymeasure it? what's the method?
13. ## 2nd law of thermodynamics

what is over unity perpetual machine?
14. ## 2nd law of thermodynamics

our teacher was explaining the equivalence of kelvin plank & clausius statement of 2nd law. i would like to know if there is any proof of them individually. thaks in advance.
15. ## How big is the universe?

is it truely possible to measure the size of universe? for even light dont reach us from some parts.
16. ## five very small questions

1. no. 4. it should for i think otherwise it would travel infinitely long distance. 5. not yet got the collapse of wave function.
17. ## Shielding home from radio waves - experiment

bats can help. Batman brother!
18. ## Question about fuel and energy.

what if some mass of the fuel gets converted to energy example radioactive fuels!!!!!
19. ## E=mc2

yes B/E=c2 where B is magnetic & E electric field.
20. ## gravity, gravity

why cant gthey rotate about same centre of mass?

22. ## Projectile Motion and Free Fall

the way the question of a simple classroom demo got compared with 500m bullet it seemedmay be the actual experiment was kind of with guns. dont u think so?.........
23. ## Projectile Motion and Free Fall

dont give guns to ur students in classroom while demonstrating they might miss the target!

nope.
25. ## Heat to mechanical energy

next time you pour coffee hold the mug.!!!!........ jokes apart there got to be some incline i think.
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