# How do you rate the power of a steem engine?

Horse power, kw/h, kilowatts, ftlb, newton meters... any rating of power will suffice

### What does conversion of electrical power to mechanical power mean?

There is no such thing as 'electrical power' or 'mechanical power' or, in fact, any other sort of power. Power is simply a rate -the rate of doing work. In SI, power is measured in watts. An obsolete unit of power is a horsepower. Although, in the Unites States, the power of an engine is usually measured in horsepower, elsewhere it is measured in watts (or, more usually, kilowatts). So, when an engineer describes converting…

### Does power give energy or does energy give power?

Power is the rate of energy transfer. Since a power station require energy source to generate electrical power and as the engine horse power would first required combustion of fuel, it is energy that give power. Answer: power is the rate at which energy is converted. So a 100 watt light used for 2 hours would use the same energy as a 200 watt light for 1 hour.