• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

Search results

  1. S

    Physics: Post your doubts here!

    Intensity prop to amplitude^2 so 2I ----> (Square root of 2 A)^2 ----> Sqr rt 2 times amplitude! If amplitude is doubled then Intensity will be equal (2A)^2 ---> 4 times Intensity!
  2. S

    Physics: Post your doubts here!

    Now now you dont need to cry, we will help! thats what XPC is for (y) r = ((a^3)(b^2)) / (2a+b) it will be 3Δa + Δb + Δa + Δb... I think... :unsure:
  3. S

    Physics: Post your doubts here!

    Im not quite good with uncertainities but here goes:- **First one I think its only x + y not 3x + y **Second one, you need to convert to percentages. When its exponent, you multiply the percentage by the power. Divided or multiplied you add the power. P.S:- Would be nice if someone confirms my...
  4. S

    Physics: Post your doubts here!

    They are in parallel not series! careful! No because the reading of the metre under the surface measures the pressure that is exerted on it, which is due to both the water and the atmospheric pressure. We just need to find the pressure due to the water. This is why we subtract not add them.
  5. S

    Physics: Post your doubts here!

    The electrical signal is converted to Pulses of light emitted by a laser or LED of frequency 2x10*8 MHz. These are recieved and converted back to electrical signals,
  6. S

    Physics: Post your doubts here!

    Q18 Work lost is the unshaded area. you dont put work to unstretch a rubberband Q23 a is max at the peaks, speed is max at the middle Q27 wrong direction of motion, its a stationary wave. Motion of particles is reflected. Q37 If it is drawn into 6 wires for example. The area of one wire in Q is...
  7. S

    Physics: Post your doubts here!

    Because there are two values of X one which is between Earth and Moon and Second is after the moon. Re is only the value of X between them.
  8. S

    Physics: Post your doubts here!

    Q15 B :- if thats the case it would go up but its in equilibrium C:- ok but thats not the reason for upthrust Q30 draw out the triangle and you will see. u=vcostheta but v = u/costheta. Q36 Its a constant voltage supply. It can only supply a voltage of V Q39 Nucleon Number of Uranium is...
  9. S

    Physics: Post your doubts here!

    yes, speed = wavelength x frequency question is asking for frequency i.e number of waves in one second :)
  10. S

    Physics: Post your doubts here!

    Someone needs to revise his prefixes :P nano is 10^-9 not ^-6 :P (3x10^8)/(600x10^-9) = C
  11. S

    I already took Chem as math ALevel and phy AS last year I got A is Physics

    I already took Chem as math ALevel and phy AS last year I got A is Physics
  12. S

    Not that good :P. Im just doing Physics A2 this June. Sudden change of plans, so I started...

    Not that good :P. Im just doing Physics A2 this June. Sudden change of plans, so I started studying it beginning of April :P
  13. S

    Physics: Post your doubts here!

    Capacitance Ratio is 1 : 2 and each capacitor can hold 6 volt max. 3 Volts 6 Volts Total = 9 Volts maximum formula is V= Vmaxsin(omega t) omega= 2pie f 120pie = 2pie f f = 120pie/2pie =...
  14. S

    Physics: Post your doubts here!

    An educated guess from the position of the piston shown in the figure :)
  15. S

    Physics: Post your doubts here!

    Well you should ask all your questions, so flood them all and I will try my best to solve the ones I know :) for Q4 smzimran, look at the piston . When it is at the middle, this means we can consider it as zero dispacement since the piston moves up and down. So when the piston is at the...
  16. S

    Physics: Post your doubts here!

    Nah, Im no genius. Im just A2 infected :P I am very much glad to help :) Feel free to post any more doubts and Ill try best to reply :D
  17. S

    Physics: Post your doubts here!

    Why do you think that is the case? Why does the frequency of the shock wave have to be much higher than the natural frequency of the seismometer? Thanks in advance.
  18. S

    Physics: Post your doubts here!

    *******Alright let me show it to you using conservation of momentum as the students were trying to investigate. Take the mass of sand and car to be the same to make calculations easier -At X Initial Momentum = mcar x v + msand x 0 ----------> speed of sand is zero since it was dropped from rest...
  19. S

    Physics: Post your doubts here!

    Who said the speed wasnt constant? When sand is added, speed decreases but continues in constant speed. As I said in my previous posts, k.e is conserved! so when we add still sand with no energy then speed has to decrease. But when sand was dropped, it was moving with the car so it had some k.e...
  20. S

    Physics: Post your doubts here!

    Because by Newtons First Law. An object will remain in constant motion with steady speed when no force is acting on it. There is no friction to slow it down as stated in the question "frictionless" and there is no force pushing it either. Hope that cleared it up,
Top