# Question: An incandescent light bulb contains a volume V

An incandescent light bulb contains a volume V of argon at pressure Pi. The bulb is switched on and constant power "is transferred to the argon for a time interval "t.

(a) Show that the pressure Pf in the bulb at the end of this process is Pf = Pi [1 + (PΔtR) / (PiVCV)].

(b) Find the pressure in a spherical light bulb 10.0 cm in diameter 4.00 s after it is switched on, given that it has initial pressure 1.00 atm and that 3.60W of power is transferred to the gas.

(a) Show that the pressure Pf in the bulb at the end of this process is Pf = Pi [1 + (PΔtR) / (PiVCV)].

(b) Find the pressure in a spherical light bulb 10.0 cm in diameter 4.00 s after it is switched on, given that it has initial pressure 1.00 atm and that 3.60W of power is transferred to the gas.

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