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Recent content by 130608

  1. 1

    help needed in physics!!

    there are a lot of different applications for the potentiometer, but in order for you to understand them i need to show you diagrams, the basic idea of it though is how a thermistor or an LDR can turn on or off a lamp/alarm..etc by different conditions depending on resistances and external...
  2. 1

    Help needed in Bio

    and about the fermenter thing, i don't about enzymes but we took how its used to make penicillin (an antibiotic), would that help?
  3. 1

    Help needed in Bio

    actually the answer is pretty simple,↲↲for greasy stains (fats) washing powders contain the enzyme lipase which breaks down large insoluble molecules of fat into small, soluble ones (fatty acids and glycerol) which can be washed off with water.↲↲For blood stains, washing powders contain the...
  4. 1

    help needed in physics!!

    anytime :D if there's anything else you need just let me know
  5. 1

    help needed in physics!!

    1) the cathode is heated to produce electrons (cathode rays) 2) the grid hole and its negative potential control the amount of electrons passing through it (to control the brightness) 3) the highly positive anode system accelerates the electrons, and has three annular rings to produce a narrow...
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