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  1. ...as iron, cobalt and nickel, have high permeability so the magnetic field lines will concentrate on these materials. In contrast, the "permeability" of air is...

  2. ...the same car would easily pass through the glass because the bullet's force is concentrated on a small area, which causes the material to flex. This causes the...

  3. ... questions When we dilute a concentrated alkali, the safest method is adding...039;re right) Why must the instrutions on how to dilute the chemical should be given on the bottle...

  4. ...rod is partially inserted, the magnetic field near that region will be more concentrated (compared to no steel rod). Hence the turning frequency will be...

  5. ... held stationary with 4/5 of the length on the smooth table, with only 1/5 hanging freely over...assume that the mass of the portion of the rope is concentrated at the centre of gravity, that is l/5...

  6. .... 4. No. Magnetic field lines are more concentrated at the poles. Hence, magnetic field strength is stronger...

  7. ...energy density is very high, you can imaginate that the sun light shined on an area 1 square meter is concentrated in 1 square mm. While LED is almost same as strong sun light.

  8. ... indicates the direction of magnetic force on a north test pole.咩測試北極磁力方向?唔係好明句野... by inserting a soft-iron core into the coil. to concentrate the magnetic field究竟係點樣 concentrate 呢? Soft iron...

  9. ...inertial frame is correct while the observation by the people on the train is invalid since they are not in an inertial.... As a result, much air seems ' concentrate ' at the back end of the train. 2008-09-11 20:59:53 補充...

  10. ... is a ferromagnetic substance, it can " concentrate " the magnetic field, thus increase the field strength. ... the voltage of the battery, or have more turns on the coil. 如果在通電期間,線圈因一些外在原因而停止轉動...