Q35 of 269 Page 149

The rise of sea-water during high tide is caused by the gravitational pull of the:

It is caused by the attractive forces of the Moon and Sun’s gravitational fields as well as the centrifugal force due to the Earth’s spin.

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Which one of the following is not renewable energy technology?

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One of the following is not required in the formation of biogas in a biogas plant. This is:

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The fuel which is not obtained from biomass is: