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  1. S

    A level Biology: Post your doubts here!

    It's A cause of their size
  2. S

    A level Biology: Post your doubts here!

    1 x 10^-2 mm is 1 x 10^-5 m. Since 1 m has 1x10^-9 nm, 1 x 10^-5 m is equal to 1x10^4 nm
  3. S

    A level Biology: Post your doubts here!

    But we're using an accurate measuring instrument which can measure up till 2 decimal places! It's for a similar reason that using a buttered is more accurate than using a measuring cylinder
  4. S

    Post your AS-Level Mathematics (P1 and M1) doubts here.

    But you can't always divide to elimate a variable right? So how can you solve the two equations using substation, and why can't we subtract to eliminate I e of the variables ? :S
  5. S

    A level Biology: Post your doubts here!

    Why isn't 93.54 an accurate value?
  6. S

    Mathematics: Post your doubts here!

    Can someone please solve this, step by step: In a geometric progression, the second term is 9 less than the first term. The sum of the second and third terms is 30. Given that all the terms of the progression are positive, find the first term.
  7. S

    Post your AS-Level Mathematics (P1 and M1) doubts here.

    Can someone please solve this, step by step: In a geometric progression, the second term is 9 less than the first term. The sum of the second and third terms is 30. Given that all the terms of the progression are positive, find the first term.
  8. S

    Post your AS-Level Mathematics (P1 and M1) doubts here.

    When is a progression convergent and even is it divergent? In p1
  9. S

    A level Biology: Post your doubts here!

    It no longer remains an enzyme catalyze s reaction but that doesn't mean that the reaction doesn't take place at all! Also it's in extremely rare cases that all the enzymes are attacked by the inhibitors. The 'free' enzymes still catalyze the reaction, which just becomes slower
  10. S

    Chemistry: Post your doubts here!

    Can someone please explain protonation??
  11. S

    A level Biology: Post your doubts here!

    Bases are a part of nucleotides. Every nucleotide has a pentose sugar, a phosphate group and one of the four bases Adenine, thymine/uracil, guanine and cytosine.
  12. S

    Physics: Post your doubts here!

    Oh so if the object is moving through air, air resistance slows it down, and since air wasnt involved in the original collision, it's not part if the system and created an external force? Ok got it thanks
  13. S

    Physics: Post your doubts here!

    How is friction an external force when the floor or the road or whatever is creating it?
  14. S

    Physics: Post your doubts here!

    Could someone please answer these!
  15. S

    A level Biology: Post your doubts here!

    But the different phases/stages of meiosis aren't, am I right?
  16. S

    A level Biology: Post your doubts here!

    Is meiosis in the As level syllabus?
  17. S

    Physics: Post your doubts here!

    That's what I meant. Why is the collision inelastic when an atom collides with a moving piston?
  18. S

    Physics: Post your doubts here!

    How come the speed of the atom decreases when it collides with a moving piston?
  19. S

    Mathematics: Post your doubts here!

    Can such a question come in As?
  20. S

    Chemistry: Post your doubts here!

    Idk both I guess
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