Ablacksmith making a tool heats 525 grams of steel to 1230°c. after hammering the steel, she places it into a bucket of water to cool it. when she removes the steel from the water, it's at 50°c. how much heat does the steel release if its specific heat capacity is 0.486 joules/gram degree celsius?

it should be p1 v1 = p2 v2

answer

i think the answer is a) as air pressure in an area increases, the density of the gas particles in that area decreases.

hope it

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3

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.