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  1. ...on electricity can create short-circuit. These kinds of fire are best extinguished by CO2 extinguisher.

  2. ... no relation between heat capacity (referred to as HC below) and bp as well as mp. Say for example, water has very high specific HC (...

  3. ...above, ultrasound wave has a much shorter wavelength, diffraction effect could well be avoided. Hence, object with small dimension can be detected...

  4. ...20, i.e. c = 343.4 m/s So the time of the stone falling into the well is: 5t2 = 40 t2 = 8 t = 2.83 s Then, immediately, the sound is...

  5. A transformer is a device that transfers electrical energy from one circuit to another through inductively coupled electrical conductors. A changing current in the first circuit (the primary) creates a changing magnetic field. This...

  6. Recite the formulae. Draw figures when ever possible to make things simple. Do more exercises to know more about types of questions. Understand the principles and ask when you have any problems.

  7. 1) During filtration, filter paper acts as a semi-permeable barrier for separating fine solids (residue) from liquids (filtrate). 2) During filtration, the filter funnel acts as the support of the filter paper, and also as the guide or a collector of liquids (filtrate...

  8. ...我的答案 2008-09-28 10:58:21 補充: I used in English Please choose me for the best answer Also, if you have furthermore question please send e-mail to me ...

  9. .... Hydroponics can be used in greenhouses as well to make the most use of the interior space 」

  10. The scientist (Michael Faraday) found that, as well as a current passing through a magnetic field producing movement, movement...