# Search results

1. ### Life made out of antimatter.

hello...i have got a basic question...does matter attract of repel antimatter...??
2. ### Can two people who are travelling in opposite directions through time communicate?

ok...thanks...!
3. ### Can two people who are travelling in opposite directions through time communicate?

i have a question? is it possible to travel back in time in any way?we can travel forward in time according to time dilation...
4. ### Frictionless Ramp question, should be very simple

use Newtons 2nd law both the masses are moving with same acceleration...by common sense...7 kg block is moving down. lets consider forces acting on 5 kg block... m(9.8)sin30 and T... as the 5 kg block is moving upward...t>m(9.8)sin30 therefore T-m(9.8)sin30=ma do the same for block of...
5. ### Simple hanging tension problem

the system is in equilibrium. draw components of both the tensions...we get T2sin30+T1sin45=ma...1 T2cos30=T1cos 45 ...2 solve de 2 eq. to get T1 and t2... please correct me...if i m wrong...i m new here!
6. ### Hanging Mass - Answer says that I am wrong

19.6/2sin15 is coming something 15.07!
7. ### Hanging Mass - Answer says that I am wrong

2Tsin15(tension)-2*9.8kg=0 am i right?
8. ### Pully and block

so is 2ucos(a) right? i think it should be!