You want to maintain a house at 25 c when the ambient temperature drops to -5 what is the minimum electrical power

Respuesta :

To maintain a house at a constant temperature of 25°C when the ambient temperature drops to -5°C, you need to compensate for the heat loss from the house to the surroundings. This heat loss can be counteracted by using an electric heater.The minimum electrical power required can be calculated using the formula:[ P = Q/t ]Where:( P ) is the power (in watts),( Q ) is the amount of heat needed to maintain the temperature (in joules), and( t ) is the time interval (in seconds).
The amount of heat ( Q ) needed to maintain the temperature can be calculated using the formula:[ Q = mc\Delta T ]Where:( m ) is the mass of the house (in kg),( c ) is the specific heat capacity of the house material (in J/(kg·°C)),( \Delta T ) is the temperature difference between the desired temperature and the ambient temperature (in °C).