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13 questions matched your search criteria.
 

a) Draw a magnetic field diagram to show the force of repulsion between two bar magnets.                                                                                       (4)

b)  Describe the magnetic field directly between the two magnets.  (1)

26 September 2013 · pardeeplal · 5 marks · 5 mins

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What is Ionization Energy?

20 October 2011 · Pippa Mercier · 2 marks · 1 mins

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Give the scientific names for:

  1. a negative ion
  2. a positive ion
20 October 2011 · Pippa Mercier · 2 marks · 1 mins

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What is an ion?

20 October 2011 · Pippa Mercier · 1 marks · 1 mins

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The paragraph mentions four different trends. Tabulate these trends showing what happens in each trend . Use only the words ‘increases’ or ‘decreases’ in your table. Use the following headings for the columns of your table:

  1. Left to Right across a Period
  2. Down a Group
20 October 2011 · Pippa Mercier · 8 marks · 3 mins

a) Draw a magnetic field diagram to show the force of repulsion between two bar magnets.                                                                                       (4)

b)  Describe the magnetic field directly between the two magnets.  (1)

19 October 2011 · Carol Grout · 5 marks · 5 mins

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Suggest two reasons why other chemists ridiculed (made fun of) Newlands’ ideas.

19 October 2011 · Carla Esterhuizen · 2 marks · 2 mins

a)   Permanent magnets used in speakers are usually very strong and therefore do not

lose their magnetism easily.  However, one may be able to weaken the magnets.

Give two ways in which one could damage a speaker or headphones.

b)   Explain why the magnet is no longer magnetic.

19 October 2011 · Carol Grout · 4 marks · 2 mins

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Use your knowledge of how magnets interact to explain how the fluctuations are caused between the magnets.

19 October 2011 · Carol Grout · 3 marks · 2 mins

Give the name of the law that states that the composition of a substance is always the same, regardless of how the substance was made.

19 October 2011 · Pippa Mercier · 1 marks · 1 mins