College Physics with MasteringPhysics 7th Edition by Jerry Wilson,Anthony Buffa,Bo Lou

تمرين 42

A lamp filament radiates energy at a rate of 100 W when the temperature of the surroundings is 20 °C, and only 99.5 W when the surroundings are at 30 °C. If the temperature of the filament is the same in each case, what is its temperature in Celsius