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  1. ...補充: Since input power is fixed, a higher efficiency leads to a higher output power (i.e. the brighter the lamp). Option...

  2. ... in strength than that seen by Y, leading to a lower induced current. 2014-11-02 16...have non-zero voltages. Hence when add up together, the zero voltage point vanished.

  3. ... opening, the reduction in pressure inside the can leads to a pressure difference between the air in the balloon and that...outside could go into the can from the other hole, filling up the space left by the outflowing liquid. Thus...

  4. ...an esternal force (such as moving a piston down into or up from the gas). Only the first of the above...of such relationship. Hence, a change of gas temperature leads to a change of gas volume, but the reverse is not feasible...

  5. ...the water. Thus lower the amount of the useful heat in heating up the water. This leads to a lower efficiency. 2. (i) The wall insulation of the room (ii) ...

  6. ...function is large in between the atoms because the atomic orbitals add up . The integral (1) is mostly contributed in between R1...

  7. (a) There is energy spent on heating up the kettle itself. Hence, the energy ...always less than the energy produced by the kettle, leading to an efficiency lower than 100%. (b) Energy...

  8. ... and Y and that beween plates Y and Z should add up together equal to 0.08 cm. That is, separation between sucessvie plates...

  9. ...equation: E= Q/εA, ε increases (insertion of dielectric) leads to an increase of Q (current flow from battery) with E be maintained...

  10. ...charge has spreaded over a larger area than before. Hence, this leads to wider separation between electric field lines. Because field line...

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