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  • Please Help with Basic Word Problem?

    We have 1 000kg of oranges on our farm on day one. On day one the oranges are 99% water. On day two they are 98% water. How much do they weigh on day two?

    Is the answer 1 000x98/99?

    3 AnswersMathematics9 years ago
  • PLEASE!! Integrals (f+g)/(h+j) with Trigs!?

    Please help me with this:

    How do you integrate the sum (or difference) of trig functions divided by the sum/difference of trig functions? Eg:

    The integral of:

    (8cosx + 6sinx)/(3sinx + 4cosx).dx

    How do you integrate general functions of that form?

    Hint: it may need you to add or multiply by an integral than can be done (ie, a simpler integral).

    Please help, I missed the tutorial because it fell on a public holiday!


    4 AnswersMathematics1 decade ago
  • Measuring 'g' with a Centrifuge?

    Is it possible to measure gravitational acceleration 'g' near the earth's surface using a centrifuge? Someone told me that if you put a small object like a pebble in a centrifuge, start the centrifuge off at a high speed, and slowly lower the angular speed. At the speed the pebble falls out, the gravitational acceleration will equal omega squared times r (radius); is this valid? (omega is angular speed, the derivate of the angle with respect to time, or 2pi radians/period if angular speed is constant)

    I do not think so, because the force here is the frictional force between pebble and centrifuge, and not the gravitational force.

    Also, If you swing anything in a vertical, circular pattern, anything inside of it will experience two forces at the top of the arc. If the measurable, centrifugal force is less than the force of gravity, the object will fall. Is this correct? If so, can this be used to measure 'g'?

    If not, is there a way to measure 'g' using a centrifuge? Thank-you.

    4 AnswersPhysics1 decade ago
  • What is the Difference Between these Shots and Balls?

    What is the difference between a hook and a pull, and what is the difference between a ball that deviates off the pitch (seam) and one that swings in the air? Thanks in advance.

    4 AnswersCricket1 decade ago
  • I Can't Concentrate!?

    I am a first year at university and I hope to major in Mathematics and something else, probably Applied Maths or Physics. I love these subjects, but for some reason I never feel like working! I just dont feel like sitting downand studying, because the work just doesn't capture my attention. I usually study the night before, and I get marks around 70% - 70%, and I know I could do much better. Can someone please tell me how I can get focused?

    4 AnswersOther - Education1 decade ago
  • Will someone please post the poem "Coal Fire" by Louis Untermeyer?

    I can't find this poem anywhere on the web, so could someone please post it as an answer or provide me with a link, thanks.

    3 AnswersPoetry1 decade ago