To make a cup of coffee you have four choices. You can - use a coffee maker
- heat a single cup of water in a microwave oven
- boil water in a tea kettle on an electric stove element
- boil water in an electric kettle.

Use the data in the following table and determine the best means of making a cup of coffee. Explain your choice using complete sentences and justify your choice (show your calculations,

The table;

Power Rating (P)
Time Required
coffee maker
900 W
4.0 minutes
microwave
1 000 W
2.0 minutes
electric stove
5 000 W
5.0 minutes
electric kettle
1 500 W
5.0 minutes