I've been confused of the following equation
The electric heater exists which can generate $P[cal/s]$.
$t:=$time which is required to raise the temperature of the water of $m[kg]$ from $a[°C]$ to $b[°C]$.
The $x$ percent of a quantity of heat which is generated from the heater will be absorbed into the water.
The below equation is true.
I've googled to find the equation which is as same as above one,however I couldn't.
I've thought that it is weird that the above equation doesn't contain a variable of a specific heat capacity.
Can anyone tell me what I've missing or the site(s) which describes of it?