✔ 最佳答案
In your experiment, the rate of heat absorbed Q by the running water can be calculated.
Q = 8 x 4200 x (40 -23) J/min = 5.71 x 10^5 J/min
where 4200 J/kg.C is the specific heat capacity of water, and assume the initial water temperature is at 23'C.
Such amount of heat comes from your sunlight lamp. Hence, in a fire scene, the heat balance equation becomes,
Q = R x 4200 x (100 - To)
where Q is the heat transferred to the water in a unit time (J/min or J/s)
4200 J/kg.C is the specific heat capacity of water
To is the initial temperature of water (you may take it as in room temperature)
R is the flow rate that is required.
But you need to detemine Q by experiment.
