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  1. ZainH

    Physics, Chemistry and Biology: Post your doubts here!

    What o.o? Both formulas are wrong, you might want to double-check your textbook... Im confident that latent heat= energy DIVIDED by mass and specific heat capacity as well, it is Heat capacity=e/mass*change in temperature
  2. ZainH

    Physics, Chemistry and Biology: Post your doubts here!

    Formula for latent heat : Latent heat= energy/mass Formula for specific heat capacity: Specific heat capicty= energy/ mass*(Change in temperature:Final temp-initial temp) LOL THIS IS A TERRIBLE DRAWING I KNOW, But you have to understand I did it using a laptop mouse in under 2 mins x)
  3. ZainH

    Physics, Chemistry and Biology: Post your doubts here!

    If the solution is AQUEOUS potassium sulfate then I believe oxygen and hydrogen should be released.
  4. ZainH

    Physics, Chemistry and Biology: Post your doubts here!

    WITH air resistance, it's acceleration isn't known.. WITHOUT air resistance, you can straight away tell that it accelerates at 10m/s because the force of gravity is 10 m/s
  5. ZainH

    Physics, Chemistry and Biology: Post your doubts here!

    For c) Use the equation for power, but you'll have to change it a bit. Power = energy /time Energy = power*time Energy = current*voltage*time Energy = current^2*resistance*time NOW you can calcuate it as you have the current, resistance, and time! ENergy = 2.5^2*3*1 =18.75J For d) it's...
  6. ZainH

    Physics, Chemistry and Biology: Post your doubts here!

    The least I could do for the bombardment of chemistry questions I asked xD
  7. ZainH

    Physics, Chemistry and Biology: Post your doubts here!

    Funny thing , it's neither and it's both. POWER determines the brightness of a lamp. And since Power = current*voltage , it's both x)
  8. ZainH

    Anytime x) What subjects are you planning to take btw?

    Anytime x) What subjects are you planning to take btw?
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  9. ZainH

    Er, well the practical part has stuff to do with maths. Like you use formulas in MS excel to...

    Er, well the practical part has stuff to do with maths. Like you use formulas in MS excel to calculate average or multiplication.. you should just have a basic knowledge of maths such as how to calculate percentage and stuff.
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  10. ZainH

    Physics, Chemistry and Biology: Post your doubts here!

    Yeah, its a switch operated by an electromagnet.
  11. ZainH

    Physics, Chemistry and Biology: Post your doubts here!

    Lol we're awesome, but your diagram > My diagram :S
  12. ZainH

    Physics, Chemistry and Biology: Post your doubts here!

    For 2)b) Power = energy/time You have the power and time so, 528*5= energy Energy is then equal to 2640. Now that you have energy, and there asking how many rungs he can climb in 5s , so now you have to find out the total height of the rungs. For that you need to use the formula for...
  13. ZainH

    LOL xD Its uh like computers and stuff :S ICT = Information and Computer Technology. It's really...

    LOL xD Its uh like computers and stuff :S ICT = Information and Computer Technology. It's really interesting, and prettyyy easy.
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  14. ZainH

    Physics, Chemistry and Biology: Post your doubts here!

    Was unsure about that myself. T Thanks for clearing it up x)!
  15. ZainH

    Go ahead x)

    Go ahead x)
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  16. ZainH

    Chemistry ATP variant 61

    Lets just drop it and wait for our results in august :s
  17. ZainH

    Physics, Chemistry and Biology: Post your doubts here!

    Heres the answer for part 8)a) The ameter is connected above the battery to measure the current in the whole circuit, the variable resistor is connected before E so only it's brightness can be varied and you have to connect lamps C and D in parallel and then add a switch so they can be switched...
  18. ZainH

    Physics, Chemistry and Biology: Post your doubts here!

    For part c) they have a dimmer light because lamps A and B are connected in series where as the rest are parallel, for part a) give me 2 mins. Making a diagram for you x)
  19. ZainH

    Physics, Chemistry and Biology: Post your doubts here!

    The 2nd point was about a transistor, here is the definition STRAIGHT from my book. "An electronic device in which a tiny current controls a much larger current and in which the larger current can be switched on or off by switching the smaller current on or off." Your right about the three...
  20. ZainH

    Physics, Chemistry and Biology: Post your doubts here!

    Decreases, just remember the equation! V= IxR.
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