If the diameter doubles (x2), the cross-sectional area quadruples (x4).
It quadruples.
More information is required. What metal? Some metals are 20 or 30 times heavier (denser) than others.
You could use a pair of calipers. Alternatively, measure its circumference using a piece of string and divide the measure by pi.
compact disk
pi * r2 * l3,14159 *2.542 * 500 = 10134 cubic centimeters = 10 liters
It quadruples.
Approximately 127 cm length of a wire with a diameter of 1mm can be used to make a 1cm cube of metal.
the metal will become hot
Acid + Metal = Salt + Hydrogen
metal replacing metal
The volume of a sphere whose diameter is 25 centimeters is 8,181 cubic centimeters
The product of the reaction is a salt of the metal.
It will keep the metal from rusting.
the metal object becomes a temporary magnet
Double-Span Metal Pratt Truss Bridge was created in 1877.
It contracts.
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