There is no defined unit called the calimeter.
about 500
Energy.
Jouls.
The answer to the question is Probably not. Someone can correct me on this later if they have experienced or found out that they do.
The energy content of bread can vary depending on the type and size, but on average, a slice of bread contains around 70-80 kilojoules.
The efficiency is 80%. To find the efficiency, 400/500 = 80%.
current is the rate of flow of charge: colombs per second or amps voltage is the amount of energy in one colomb of charge: volt or jouls per colomb voltage times current is the power.
A microwave oven does not use heat to cook food like a conventional oven, instead it uses microwaves to cook the food. The microwaves produce the heat inside the food, thereby cooking the food from the inside out.
Electrical power is expressed in watts or in jouls per secondAnother AnswerThere is no such thing as 'electrical power'. Power is simply a rate: the rate of doing work. Power can be measured in watts (in the SI system) or in horsepower (in the Imperial system). There is no reason why the power of a heater can't be measured in horsepower or the power of a car can't be measured in watts.
one-to-one relationship in adatabase
one to many; many to one ; one to one
Don't know about three: how about the following four?One-to-one, one-to-many, many-to-one and many-to-many.