A piece of metal (mass = 125.0 g) at 101 °C is placed in a styrofoam coffee cup containing 75.0 g of water at 21 °C . After several minutes the temperature stops changing and is found to be 31 °C. Assuming that no heat was lost to the cup or the surroundings, what is the specific heat capacity of the metal? The specific heat capacity of water = 4.184 J/g°C.

the answer is na (sodium)

answersilicon (si); oxygen (o);

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.