• 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. O

    Physics, Chemistry and Biology: Post your doubts here!

    :ROFLMAO: It is the time for half the substance to decay.
  2. O

    Physics Paper 1 question!

    Yes the area of the pin acting on the thumb is smaller than the pinhead so it is D...
  3. O

    Physics, Chemistry and Biology: Post your doubts here!

    They changed the magnetic poles so us the Flemings left hand rule, or simply put the opposite.
  4. O

    Physics, Chemistry and Biology: Post your doubts here!

    You have the weigh of 2 Kgs, you need to find the weigh of ten. Simple math 5*2 =10 so you need to multiply 18*5 also.
  5. O

    Physics, Chemistry and Biology: Post your doubts here!

    So only 34 and 38. q34) Right hand grip rule, the current is anticlockwise. So the compass facing that direction is C only. q38) B, the alpha is helium nucleus. So 2 neutrons are lost. which Is 138-2=136.
  6. O

    Physics, Chemistry and Biology: Post your doubts here!

    4, 5, 8 and 18 are the same.
  7. O

    Physics, Chemistry and Biology: Post your doubts here!

    q4) Not A, because the balance can measure mass. Not C, not you can have a paper which is larger than a piece of iron, but iron has a larger volume. Not D, weight is force mass is not. So it is B. q5) You need to find the weight for the 10kg on that planet. So it is 5*2 = 10, 18*5 = 90. Which...
  8. O

    Physics, Chemistry and Biology: Post your doubts here!

    V1 ?
  9. O

    Physics, Chemistry and Biology: Post your doubts here!

    I'm here.
  10. O

    Physics, Chemistry and Biology: Post your doubts here!

    Yeah I forgot that.
  11. O

    Physics, Chemistry and Biology: Post your doubts here!

    It is because the hot air from the heater moves upwards moving the cold air down so it must be towards the heater not away because hot air goes away and it is directed to the top.
  12. O

    Physics, Chemistry and Biology: Post your doubts here!

    :confused: I forgot that the voltage increases also so that it makes the power the same, so the brightness is full. Sorry for the wrong one.
  13. O

    Physics, Chemistry and Biology: Post your doubts here!

    Q7) Mass is the same, but volume is different. Density= Mass/Volume. Let's assume a mass I'll take 100g. 100/200 and 100/100. So the Density of X is half the density is Y. q19) B, convection in air. Hot air is less dense so it moves upwards pushing cold air down. So the air moves in is cool...
  14. O

    Physics, Chemistry and Biology: Post your doubts here!

    No problem, but it's easier to know one. (y)
  15. O

    Physics, Chemistry and Biology: Post your doubts here!

    An extract from the core syllabus, you can study it from your book; " Relate a rise in the temperature of a body to an increase in their internal energy, show ad understanding of the term thermal capacity. "
  16. O

    Physics, Chemistry and Biology: Post your doubts here!

    No, the thumb is for the direction of current.
  17. O

    Physics, Chemistry and Biology: Post your doubts here!

    both work for knowing the magnetic field for a wire, but only the right handrule works for the coil.
  18. O

    Physics, Chemistry and Biology: Post your doubts here!

    Using the right hand grip rule, the current is out of the page so your thumb should be pointing out of the page and the rest of our fingers will show the direction of magnetic field, it is C because the compass is pointing in the right direction.
  19. O

    Physics, Chemistry and Biology: Post your doubts here!

    B, the current from the lamp with full brightness is 0.25. So it must be 1 for the fuse. Even if the wire carries 5A.
  20. O

    Physics, Chemistry and Biology: Post your doubts here!

    Q2 ) Acceleration from the hit, acceleration from the gravity, and for R it Is accelerating as it was at rest for a moment when it reached the ground. q12 ) Because in that space above the barometer it is vacuum. Which is about 0 pressure.
Top