Not enough information the voltage is needed also.
The time is immaterial. A 550-watt motor operating at 8.5 amps needs a voltage of 550/8.5 volts.
7.5 kW equates to 25,591 BTU/hour.
it was a steam powered motor that would acheive 20 miles per hour
It depends on the motor's design. One motor I recall could only be started three times in an hour, and then only in exigent circumstances. Others are not so limited. It comes down to the thermal load that is placed on the motor as a result of startup.
If you only hear a click sound and the motor is not turning then you either need a new starter or your battery cable that goes to the starter is loose.
To answer this question the voltage and amperage of the motor must be given.
About 3 Miles Per Hour
In MPH, which Miles Per Hour.
It depends what rpm the motor is running at and what displacement the motor is
I think they start with 12.00 an hour
About $12.00/hour to start.
About 1 hour at the most.