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1. How many watts are needed to operate a flat iron for one hour and 15 minutes?
2. How many watts will a washing machine consume seven hours?
3. How many watts will operate a sewing machine for 45 minutes?
4. How many watts will an electric stove use up for 15 minutes?
5. About how many stereos all operating at the same time for one hour, can be run by one megawatt of electric power?.