Pedro123's latest activity

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    Pedro123 replied to the thread Proof question help..
    Here's a brief rundown, reply if you want a more detailed response. Take 3 points A, B and C. Draw lines AB and BC, labelling their...
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    Pedro123 reacted to blyatman's post in the thread Definite Integral with Like Like.
    Yes that's the definition of an integral. An integral is essentially just an infinite sum, so the upper limit of the sum needs to go to...
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    In more concrete words, you are asked to show n = \cos^{-1} \frac 35, given the conditions a \cos \alpha = 1, a \cos (n+\alpha) = 5...
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    Pedro123 reacted to Drdusk's post in the thread Polynomials question with Like Like.
    Because it says P(x) is an odd polynomial. With an odd function P(x) = -P(x). It also has degree 3. You can only have a degree 3...
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    Pedro123 replied to the thread Definite Integral.
    Yes there is, but it's a pain to do, which is why we don't consider it compared to first principles for differentiation. I would write...
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    Pedro123 reacted to blyatman's post in the thread Mean of a function with Like Like.
    Consider this example: Suppose you have a moving object, whose velocity varies according to some velocity function v(t) between t = 0 to...
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    Pedro123 reacted to TheShy's post in the thread Please help? with Like Like.
    a) dy/dx =2x-5. Sub in x=2 into dy/dx to find gradient. Then use the y-y1=m(x-x1) to find tangent. The normal is the same but the...
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    Pedro123 reacted to mikikieko12's post in the thread Bromine water question with Like Like.
    When bromine water is added to cyclohexene, cyclohexene readily reacts with the bromine and opens the double bond as it bonds to the...
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    Pedro123 reacted to jazz519's post in the thread Heat of Combustion Help with Like Like.
    Usually for practical exams you should know: - Aim - Hypothesis - Safety issues and how to resolve them - Method (and why you do things...
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    Pedro123 replied to the thread Human Rights.
    You probably want to do both - so a more general overview as to what each body does, and then a more specific analysis of how they help...
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    Pedro123 replied to the thread Quantitative chemistry.
    Mol of H2S = 16/(1.008*2+32.065) = 0.469 mol Mol of SO2 = 20/(16*2+32.065) = 0.312 mol This means that since the ratio should be 2:1...
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    Pedro123 reacted to jazz519's post in the thread WHAT HAPPENS TO MY STUFF?! with Like Like.
    It depends on the school but my email I remember went inactive after like a year. What I did to get around that issue without having to...
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