metals, non metals and metalloids questions

When a metal sheet of rectangular shape is heated, its length is increasing at 2 cm per second and width at 3 cm per second. Find the rate of change of its area, when its length is 14 cm and width is 12 cm? => 26 cm 2 /sec or 42 cm 2 /sec or 66 cm 2 /sec or 64 cm 2 /sec or 24 cm 2 /sec..

The inner and outer diameter of a metallic pipe are 7 cm and 8 cm. Length of the pipe is 4 m. Find the total surface area of the pipe in sq.cm. [Take π = 3.] => 18022.50 sq.cm or 17946.50 sq.cm or 18089.50 sq.cm or 18198.50 sq.cm..

The cost of x gm of a precious metal can be modeled by c ( x ) = $(800 x 2 + 300 x ). Find the limiting value of the cost of the metal when x approaches 4. => $8000 or $13100 or $14000 or $4400 or $7000..

A metal rod of length 10 / 7 meters was cut into equal pieces of length 2 / 7 meters. Find the number of pieces the rod was cut into. => 5 or 4 or 7 or None of the above..

George made a metalic sculpture of Jules Dalov, which stood 20 3 / 4 inches tall. He also made a bronze sculpture 'Hand of God', which was 15 7 / 8 inches taller than the sculpture of Jules Dalov. Find the height of the sculpture 'Hand of God'. => 36 10 / 12 inches or 36 7 ..

These elements have characteristics common to metals and non-metals. For example: Arsenic, tin, bismuth e..

(with the exception of hydrogen) that are found to the right on the Periodic Table i.e., groups IIIA, IVA and VA. The non-metallic character of these elements increases from top to the bottom of the group. For example, in group VA the first and second members are non-metals, the..

The progress of the civilization was first benchmarked by man's increasing knowledge and usage of metallic deposits in the earth's crust. Early man used stones, bones and wood to fulfill their requirements of hunting, cooking and buildin..

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