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Search results

  1. KyleoAhsan

    Biology; Chemistry; Physics: Post your doubts here!

    Well somewhat it don't make sense because I don't really know how to actually explain it! :P and I think I actually explained it in a silly way! :P! Well it seems that Work Done = F x D in the formula [ F ] is linear not the resultant force and so 500N - 100N is the resultant force! and if...
  2. KyleoAhsan

    Biology; Chemistry; Physics: Post your doubts here!

    Well I made a little mistake its actually 300J because its the work done against friction! which means how much work is done by the frictional force as the box moves a horizontal distance of 3m! A little more detail : ------------------------ So for example : I push a car and I exert a force...
  3. KyleoAhsan

    Biology; Chemistry; Physics: Post your doubts here!

    First what is magnitude? It is a number and the S.I Unit! For example! 5 seconds = 5 s or 500 Newton = 500N Now in a scalar quantity there is only magnitude! whereas in vectors there is magnitude AND direction! The difference between vector and scalar is that vector has a direction given...
  4. KyleoAhsan

    Biology; Chemistry; Physics: Post your doubts here!

    You are right! Redspot does give the answer as 300! ------------------------------------------------------------------------------------------------------------------------------------------------------- They have taken the frictional force instead of the horizontal force! But to be...
  5. KyleoAhsan

    Biology; Chemistry; Physics: Post your doubts here!

    That is a work done question so lets put the information we have from the question in to something that we can easily understand and then derive which formula to use! The information provided are that :- There is a horizontal force of 500N and a Frictional Force of 100N...
  6. KyleoAhsan

    You are welcome ^.^

    You are welcome ^.^
  7. KyleoAhsan

    Mathematics: Post your doubts here!

    Sequence is nothing that people should worry about...you need to have a good understanding of Algebra and sometimes learning common patterns are also helpful as well as learning about square and cube numbers will help a lot too..! That's pretty much about Sequences ! The more you do sequence...
  8. KyleoAhsan

    Mathematics: Post your doubts here!

    Thanks ! It was already solved in my post in IGCSE section! But thanks your answer is correct :)!
  9. KyleoAhsan

    Mathematics: Post your doubts here!

    P and Q are positive quantities, P is inversely proportional to Q² . when P = 160 Q = 20. Find the value of P when P = Q
  10. KyleoAhsan

    Biology; Chemistry; Physics: Post your doubts here!

    Good notice! Sorry I misread the question! Well if the plane is moving exactly in the opposite direction then! The vector quantity will be negative! and hence that means - 400 - 500 = -900 Km/h In that paper it says exactly the opposite direction so it automatically changes to ( - ) Here...
  11. KyleoAhsan

    Biology; Chemistry; Physics: Post your doubts here!

    The change in velocity is calculated by the difference in final velocity and the initial velocity! so for your example question it had be -100 km/h i.e. Final - Initial = 400 - 500 = -100 km/h Velocity can be affected by two things! That is DIRECTION and THE SCALAR QUANTITY! In your...
  12. KyleoAhsan

    Hey people of xtreme!

    ChemWhiz xoxo That means you are hybrid or something? :P! So you have an Allele from Aries and Taurus? Giving you pure awesomeness? ;)! Somehow you look really good..as in the way you have described yourself...only a few people in the world can truly describe themselves in such a prominent way !
  13. KyleoAhsan

    Physics, Chemistry and Biology: Post your doubts here!

    Nope! There are many I think...but for our syllabus I believe we only need to know 3 and they are: 1. Light Intensity 2. Temperature 3. Carbondioxide Concentration Well in the syllabus it says Understand the concept of limiting factors... It works like this: when one factor is limiting...as...
  14. KyleoAhsan

    Physics, Chemistry and Biology: Post your doubts here!

    Once again let me try to help you! :D So basically a limiting factor is a factor that if it is increased the rate of reaction increases... For instance : If the light intensity is the limiting factor - As you increase the light intensity the rate of photosynthesis increases * But there...
  15. KyleoAhsan

    Hey people of xtreme!

    ChemWhiz xoxo...let me make a guess: Your favourite subject is Chemistry ;)! ? And Welcome to XPC - though I am not a very old member of XPC hehe! :P
  16. KyleoAhsan

    IGCSE Maths HELP!

    Thanks a lot :D! By the way Kudos for you...you have just solved a A* level question :D!
  17. KyleoAhsan

    What Grades You are ExpectINg.......

    It may seem a little bit unrealistic! but only when you have a higher goal and are willing to take the burden to achieve your goal...you can reach it! without a higher goal lets say for instance " A " you might get an A or B and rarely A*...if you Aim for A* you have higher chance of getting A...
  18. KyleoAhsan

    Physics, Chemistry and Biology: Post your doubts here!

    Lets evaluate and try to get some logical answers for it! Lets take Sodium as an example: 2Na + 2H2O ---> 2NaOH + H2 The reaction between Sodium and water is very vigorous! It should be Exothermic... Since the addition of Sodium to water will produce a lot of energy i.e. Heat Energy...
  19. KyleoAhsan

    Biology; Chemistry; Physics: Post your doubts here!

    Both compounds have a oxidation number of 0 That is because Ca has a charge of +2 and NO3 has a charge of -1 So there are two nitrate ions joined to one Calcium ion so 2 + 2(-1) = 0 Likewise, NH4 ion has a charge of +1 and CO3 has a charge of -2, Since there are 2 ammonium ions, 2(+1) + (-2)...
  20. KyleoAhsan

    Mathematics: Post your doubts here!

    The minute hand of a clock is 9 cm long and the hour hand is two-third as long.How much more distance will the tip of the minute hand move then the hour hand in one hour?Give your answer correct to 1 decimal place. I am just going to make an attempt to it Now from question we know that hour...
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