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6 questions matched your search criteria.
 

The following is the structural formula of a gas:

Isomerpic.png

How many isomers does this compound have?

 

A.

1

 

B.

2

 

C.

3

 

D.

4

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

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Do you think going through a red robot is worth the risk? Briefly discuss your answer.

19 October 2011 · Colleen Henning · 3 marks · 3 mins

A wire has a resistance of 8Ω.  A second wire, made of the same material, has half the length.  What is the probable resistance of the second wire?

 

A.

4Ω

 

B.

8Ω

 

C.

16Ω

 

D.

24Ω

19 October 2011 · Carla Esterhuizen · 2 marks · 1 mins

Two resistors of 6 Ω and 12Ω are arranged in parallel.  A potential difference is connected across the terminals X and Y.

resistors.png

 

A.

4A

 

B.

6A

 

C.

8A

 

D.

12A

19 October 2011 · Carla Esterhuizen · 2 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

The question below has reference material. View the reference material and all the questions based on it.
  1. Which type of oil appears to be best for your heart? Explain your answer.(3)
  2. Cultures that use only olive oil in food preparation have less heart disease than cultures that use other types of oil.  Suggest one possible reason for this. (1)
  3. A 25g packet of crisps typically contains 6g of oil.  Calculate the total mass of saturated fat due to the oil in the 25g packet if the crisps were made using only palm oil. (2)
  4. Suggest two physical characteristics that may be different in the oils in the table. (2)

 

19 October 2011 · Carla Esterhuizen · 8 marks · 10 mins