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  1. S

    Physics: Post your doubts here!

    Let's restate that equation: (Tension in P) * l / AY = 4 * (Tension in Q) * l/ AY The 4 comes about because we are multiplying by 2 (2l) and dividing by 1/2 (from A/2) so together they give us multiplied by 4. We can now divide both sides by "l". This gives us (Tension in P) / AY = 4 *...
  2. S

    junior chodo, hum sab yahaan equal hai, all looking to study, learn something new, no difference...

    junior chodo, hum sab yahaan equal hai, all looking to study, learn something new, no difference here :-)
  3. S

    waiting....applied to uni, but still some time left for semester to start :-)

    waiting....applied to uni, but still some time left for semester to start :-)
  4. S

    i wrote them in 2012 and 2013 ;-)

    i wrote them in 2012 and 2013 ;-)
  5. S

    physics aur maths are among the toughest subjects, right? So if they went well, it's an awesome...

    physics aur maths are among the toughest subjects, right? So if they went well, it's an awesome achievement! don't worry, effort is always rewarded, there's no telling what's heading your way - even if you are doing again, you can only do even better, no? Best of luck either ways!
  6. S

    Hello ji, kya haal-chaal hai aapki?

    Hello ji, kya haal-chaal hai aapki?
  7. S

    Physics: Post your doubts here!

    From the diagram, we can see that resistors A and B are connected to each other in series. Therefore, their total resistance R(A+B) is equal to R + R = 2R. Furthermore, together they are connected in parallel to D, so 1/R(A+B+D) = 1/(2R) + 1/(R) = 1/(2R) + 2/(2R) = 3/(2R) Therefore, R(A+B+D) =...
  8. S

    Physics: Post your doubts here!

    Q20) Suppose you attach two springs in series (i.e. the ends contact each other) and attach a load to the bottom spring, both springs (assuming their masses are negligible) will display the same extension - the extension of one of these connected springs will be equal to the extension of that...
  9. S

    Physics: Post your doubts here!

    An independent variable is something you physically change; it is something you can control, or something that changes on it's own. It does not depend on any other variables, and it is the value you are supposed to plot on the x-axis during the analysis stage of your experiment. A dependent...
  10. S

    Physics: Post your doubts here!

    Q7) The relationship needed for this question is the vector relationship F(net) = ma. This equation tells us that the acceleration of a body is in the same direction as the vector representing the Net Force on that object. The magnitude of this acceleration is given by F/m. Since the force...
  11. S

    Physics: Post your doubts here!

    Yeah, that should be it. There is an alternate method, though, just in case you're interested: Find the gradients of the steepest line that passes through all the error bars, and the shallowest line that passes through all the error bars. Suppose they happen to be 5.7 and 4.3 in any units (and...
  12. S

    Physics: Post your doubts here!

    In Physics, whenever you are adding two or more quantities, their units have to be the same; adding meters to seconds makes no sense, so we cannot perform that kind of operation. Therefore, we know that the units of R/P are equal to the units of Q/P. Since P is common to both, with common units...
  13. S

    Physics: Post your doubts here!

    You need to apply Kirchoff's Second Law for this question; if you put your finger at N, and move to M, then L, then K, and finally back to N, and sum up all the changes in potential energy of the current flowing through the wires then you should get zero (if you start at N, and return to N, then...
  14. S

    Physics: Post your doubts here!

    I'm not able to understand your question; hopefully this guess might help, if not i'm sorry, could you explain again? Uranium-235, according to the given equation, can decay into Barium-141 and Krypton-92; each nucleus in the sample used will undergo this reaction, and since the equation is...
  15. S

    Physics: Post your doubts here!

    1) - 4 b (iv): 1. Applying Kirchoff's Law, we get the value of the current to be 0.24 Amperes. So, the potential difference across a resistor with resistance R and current I flowing through it is given by P.D. = IV = 0.24 * 5.5 = 1.32 Volts. (However, since this is a drop, the change...
  16. S

    Physics: Post your doubts here!

    Supposing we have two numbers defined as a = 5.0 ± 0.2 b = 3.0 ± 0.6 and we have to multiply them together, thus giving us a result of a * b = (5.0 ± 0.2)(3.0 ± 0.6) In this case, we convert their absolute uncertainties into percentage uncertainties before multiplying, and this gives us a...
  17. S

    Physics: Post your doubts here!

    7a(ii): 1. (I'm pretty sure the E.g thing is a typing error, since there's no "g" variable in the question - the answer should be E.q or qE). Since the moving particle is positively charged and the upper plate is negatively charged (not to forget, the lower plate is positively charged), the...
  18. S

    [82216:unique111] haha, never mind, hadn't expected that ;-)

    [82216:unique111] haha, never mind, hadn't expected that ;-)
  19. S

    I understand hindi, but thanks anyways ;-) been busy with other stuff, not been able to come...

    I understand hindi, but thanks anyways ;-) been busy with other stuff, not been able to come online often, so.....
  20. S

    Important SAT 2 material(like practice tests) free!

    You're welcome, though I should say this - if there is some sort of preliminary calculation to obtain the wavelength of orange light, I have no idea what it is, so the best way of confirming would be checking the entire paper for a table containing those values or an additional information sheet...
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