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1. ### How long to reach 0.9 c, accelerating at 1 gravity?

...relativistic mass M is km, where k is the Lorentz factor, k = c / (c^2 - v^2), where c is of course the speed of light. Now, we usually...

5 Answers · Science & Mathematics · 02/11/2006

2. ### Physics Geometric Optics question?

... with this speed. Then time of traverse dt will be dt = dx/(-c/kx) = -(k/c)* xdx So the total time of traverse (T) to go over right from the height...

2 Answers · Science & Mathematics · 06/03/2010

3. ### Help with Physics question?

...it like that! Note that you can only use kelvin for this, not celcius. K = C + 273. so: So we have 2 sets, v1 and 21C, and v2 and ...

1 Answers · Science & Mathematics · 23/09/2011

4. ### Physics 20 help- graphing period as a function of spring constant?

... = 2pi*sqrt(m) * 1/sqrt(k) y = m*x + c y => T x => 1/sqrt(k) c = 0 (should go through origin) slope m = 2pi*sqrt(mass) Unit is kg^0...

2 Answers · Science & Mathematics · 29/05/2013

5. ### a block of mass 1.5kg slides on a rough horizontal table with a coefficient of kinetic friction equal to 0.25.?

...formula: we'll get: x = [ -b + sqrt(b^2 - 4ac) ] / 2a which: b = 2μmg a = k c = -mv^2 we'll get: b^2 -4ac = 2 sqrt(μmg + kmv^2) ==> x = 2[-μmg + sqrt...

2 Answers · Science & Mathematics · 16/08/2012

6. ### Determine the acceleration of the system and the tension in each cable.?

Let T1 = tension in cable AB and T2 = tension in cable BC. Let a = common acceleration of the system. Cosidering free body diagrams of blocks A, B and C, for dynamic equilibrium of the blocks, 25g * sin30...

2 Answers · Science & Mathematics · 26/11/2011

7. ### Circular motion physics help?

...a constant value k = v²/r v² = kr v = √kr = √k • √r {let √k = c = a constant value} v = c√r ANS => circular speed is directly proportional...

1 Answers · Science & Mathematics · 20/02/2013

8. ### Physics problem? HELP!?

Well basically, E will apply force on electron in -j^ because e- is -vely charged so B has to be in dirxn. outwards perpendicular to plane of paper i.e. in +ve k^ (flemming left hand rule) so as to cancel force due to E. So answer is out of B) or E) option, pt...

2 Answers · Science & Mathematics · 28/10/2013

9. ### Extremely Difficult Unit Vector Question?

I think: BACC Explanation follows. _______________________________ (i) B is true because for a cross product to be zero, the vectors must be parallel. (3î) X B=0 means B is parallel to î (the x axis...

3 Answers · Science & Mathematics · 07/11/2012

10. ### extremely hard physics questions...with answers...but plz show how u got answer...i couldn't get these ones...

both are right. good luck picking best answer!

3 Answers · Science & Mathematics · 11/01/2008