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  1. A

    Solving (x-1)/(x+2) < 1 with rational inequality

    thanks for telling me! now i see how much easier it is :)
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    Solving (x-1)/(x+2) < 1 with rational inequality

    I've tried squaring both sides, then moving the RHS to the LHS, then factorizing according to a2-b2=(a+b)(a-b). I simplified, and got ((2x+1)/(x+2))((-3/(x+2)) < 0 Then there are 2 cases: ((2x+1)/(x+2)) < 0 and ((-3/(x+2)) > 0 or ((2x+1)/(x+2)) > 0 and ((-3/(x+2)) < 0 I'm not...
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    When working out the Uncertainties, what to do with the constants?

    ok, thanks so much!
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    When working out the Uncertainties, what to do with the constants?

    Oh ok I see... so eg. v=2as, then would I need to multiply the 2 to the uncertainties of a and s, or would I ignore it like you said?
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    When working out the Uncertainties, what to do with the constants?

    Q=mcT, variables with uncertainties are m and T. If it were only Q=mT, the %uncertainty of Q would be %uncertainty of m + % uncertainty of T. But c=constant (no uncertainties), so what is the uncertainty of Q when Q=mcT? Do you just multiply the constant to the %uncertainties of m and T...
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    Why does smaller measured specific heat capacity suggest more heat loss?

    well, thanks a bunch!^^
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    Why does smaller measured specific heat capacity suggest more heat loss?

    Oh...so it's hypothetical... we imagine that Q will have to increase because more energy will be needed for the water to reach the same temperature without heat loss...so c must also be considered bigger to balance the equation. Therefore in reality, c should be smaller since Q absorbed is...
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    Why does smaller measured specific heat capacity suggest more heat loss?

    So...c should be bigger? But c is supposed to be smaller if heat is lost to the atmosphere... My teacher says so and this too: http://wiki.answers.com/Q/Why_specific_heat_capacity_of_water_by_experiments_is_less_thanthe_actual_heat_capacity_of_water Could you please explain in detail why...
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    Why does smaller measured specific heat capacity suggest more heat loss?

    In an ideal world, rate of thermal energy absorbed by the water = rate of electrical energy developed by the wire, as the wire gives off heat. But in the real world, some of the electrical energy converted into heat will not all go to heat up the water, but to the surrounding air instead...
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    Why does smaller measured specific heat capacity suggest more heat loss?

    no one :(
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    Why does smaller measured specific heat capacity suggest more heat loss?

    anyone?
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    Why does smaller measured specific heat capacity suggest more heat loss?

    Homework Statement If the specific heat capacity of water from an experiment is smaller than its actual value, does it mean more heat is lost to the surroundings? If the heat is emitted by a wire into a cup of water and the change in temperature is measured, does it mean that the change in...
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    High School The value for normal room pressure?

    oh thanks!
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    High School The value for normal room pressure?

    what about in pascals? can pressure be negative too?
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    High School The value for normal room pressure?

    What is it?
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