Recent content by Rajo Yajo

It is an incadescent lamp, but I don't know whether I should consider its heat capacity to be E=P*Δt or use the heat capacity of tungsten. The air inside the box is not stirred. So I guess that the majority of the heat transfert is done by convection. We are measuring the temperature of the...

Thank you for replying :) Actually, there are five little holes on the box. They allow to put temperature sensor inside the box. Is it possible to calculate the loss of energy due to these holes? ps: When we do the experience, it takes around 30 seconds to gain 3°C.

Homework Statement The box's measurements are 277*120*195mm. The lamp's power is 15W. Trying to figure out how long it will take to heat the box so that it reaches a given temperature. According to Wikipedia ρair=1,2kg/m3 and cp air=1004J*K-1*kg-1 Homework Equations ΔU=m*cp*ΔTemperature E=p*Δt...