Natasha Tai Qian Hui

Forum Replies Created

Viewing 4 posts - 1 through 4 (of 4 total)
  • Author
    Posts
  • in reply to: O Level – Additional Mathematics #1120

    Please help me solve the following sums.
    1. The prime factorisation of two numbers are 2, 3 to the power of 2, 7 to the power of 3 and 13 and 3, 7 to the power of 2, 13 to the power of 3 and 17. Write down, in ascending order, all the common factors which are less than 100.

    2. Find all the possible values of the digits x and y if the six digit number 123x4y is divisible by 36.

    I need to hand this worksheet up by Friday.
    Thanks!
    Natasha Tai

    in reply to: O Level – Physics #1097

    Thanks!
    Natasha

    in reply to: O Level – Physics #1095

    Please help me fill in the following:
    choices are:
    beaker, conical flask, test tube, flat-bottomed flask, crucible, boiling tube, pipette, evaporating dish, filter funnel, measuring cylinder, bell jar, wire gauze, gas jar, water trough, retort stand, round-bottomed flask, tripod and cuvette

    1) To store and to transfer chemicals (not meant for measuring accurate volume of liquid
    2) to contain or heat a small amount of solid substances
    3) to contain or heat a small amount of solid and liquid substances
    4) to heat solids directly over a flame
    5) to evaporate liquids (my answer: evaporating dish)
    6)to help transfer chemicals into apparatus with small opening. To separate a solid from a liquid with the help of a filter paper. (My answer: filter funnel)
    7) To measure a specific volume of liquid
    8) To measure very accurately a specific volume of liquid (eg. 25.0 cm3, 50.0 cm3)
    9) to collect gases (my answer: gas jar)
    10) to isolate an experiment set up from the outside experiment (my answer: bell jar)
    11) To support apparatus during heating (my answer: retort stand)
    12) to support a container (such as beaker or flask) during heating. When the Bunsen Burner flame is beneath it, the wire gauze helps to spread the flame (and heat) out evenly over the container.
    13) To hold/support apparatus during experiment
    14) For mixing and swirling chemiclas. To store chemicals (my answer: conical flask)
    15) For heating liquids and to prepare gases when heating is required (my answer: round-bottomed flask).
    16) To store liquids and to prepare gases when heating is not required
    17) To contain water (eg. while collecting gases by displacement of water)
    18) to hold samples for spectroscopic experiments

    I can only answer some but mostly I am not sure. Pls help. I need to submit this assignment by tomorrow.

    Thanks, Natasha

    in reply to: O Level – Additional Mathematics #1083

    help me to calculate the following sum:
    1/2 + 2/4 + 3/8 + 4/16 + …….+ 10/2 to the power of 10.
    thanks!

Viewing 4 posts - 1 through 4 (of 4 total)
Call Now ButtonCall Us Now