little black book free online

Consider two bodies of equal surface areas suspended in a room. One of the bodies has a polished surface and the other is painted black. After sufficient time, the temperature of both the bodies are equal to the room temperature. As the surface areas of the bodies are the same, equal amou..

When natural gas is burnt in limited supply of air, the resulting soot is deposited on the underside of a revolving disc. This is carbon black and it is then scraped off and filled in bags. It differs from lamp black in being not so greasy. Carbon black is added to th..

A quiz book in the public library weighs one pound. Choose the best relationship for one pound. => 1 pound is little more than 1 kilogram. or 1 pound is little less than half a kilogram. or 1 pound is equal to 1 kilogram. or 1 pound is little more than half a..

Lamp Black is also known as Soot. Soot is obtained by the incomplete combustion of carbonaceous, fuels, especially oil fuels, in limited supply of air. The soot settles on the cooler parts of the chamber, and can be collected by scrapping it (Fig.10.5). It is used in the manufacture of pr..

Lamp Black is also known as Soot. Soot is obtained by the incomplete combustion of carbonaceous, fuels, especially oil fuels, in limited supply of air. The soot settles on the cooler parts of the chamber, and can be collected by scrapping it. It is used in the manufacture of printin..

Heat and Thermodynamics..

Find the perimeter of the shaded rectangle, if the length of each little square in the grid is 1 unit. => 16 units or 12 square units or 16 square units or 12 units..

Find the perimeter of the shaded region if the length of each little square in the grid is 1 cm. => 20 cm or 10 cm or 14 cm or 12 cm..

There are some gray and some black buttons in the figure. Identify the ratio of gray to black buttons. => 1 : 5 or 1 : 4 or 5 : 4 or 4 : 5..

There are 19 books on Geography, 16 books on Zoology and 20 books on Math in a bundle of books. Three books are selected one after the other. Find P(book on Zoology, book on Geography, no book on Math). => 2 321 or 152 ..