What charge card, developed in 1950, was the first to be accepted nationally in the US?

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Which is the heaviest metal?

A. Iron B. Mercury C. Nickel D. Osmium...

The speed of light will be minimum while passing through:

A.Glass B.Vaccum C.Water D.Air...

The deficiency of vitamin K causes ________ ?

A. Loss of appetite B. Scurvy C. Sterility D. Blood clotting disorder...

Bronze is a alloy of ?

A. Copper & Zinc B. Copper & Tin C. Tin & Zinc D. Iron & Zinc...

The subatomic particles arriving from outer space having high energy are called?

A. protons B. electrons C. cosmic rays D. None of the above...