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Units to Know

Discussion in 'MCAT Study Question Q&A' started by fingerscrossedd, Aug 10, 2011.

  1. fingerscrossedd

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    Okay everyone, we all know that knowing your units is key on the MCAT. Let's start a list of useful units and their contexts.

    Ex:

    Watts=J/s=Power
     
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  3. Bumbl3b33

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    N= (kg*m)/sec^2
    J= N*m
    V= (N*m)/C
    E-field= N/C
    Capacitance= C/V

    That's really all you need since everything else can derived from equations or vice versa.
    I.e. V=E*d
    Or, for your example
    Power = Energy/time= J/s= (N*m)/s
     
  4. MD Odyssey

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    Honestly, I never really had to learn any of these. I think that by working with these long enough it sort of just becomes second nature.
     
  5. mikexima

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    yup, it has to become second nature to you. memorizing them is useless.
     
  6. MT Headed

    MT Headed snow, PBR, and bears
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    1 second = 1 ohm farad

    I use that once or twice a year to wow my audience.
     
  7. MT Headed

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    Oh, and intensity is kg/s^3.

    As in, if you have a situation where you suddenly have 1 kg of material after 1 second, then a second later you have 8 kg, and a second after that you have 27 kg, etc. you have an intensity of 1.
     

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