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There's no definite standard. A 2 iron is typically 18
1 metre
Let's assume that your golf ball is 1.680 inches in diameter - the smallest size golf ball allowed in certain golfing associations. Then we know that the circumference of the golf ball will be the distance it would roll in one complete rotation. Circumference = pi * diameter Circumference = 3.14 * 1.680 in Circumference = 5.2752 inches = the distance that this particular golf ball would roll
Wrapping a number of coils of insulated wire around an iron nail, and a passing a current from a battery through it, turns the iron nail in to an electro-magnet. While the current flows, the nail will attract metal objects. It is a standard demonstaration in science classes in schools. The more turns the stronger the attraction.
Well, darling, a 1-cm cube is a tiny little thing, measuring 1 centimeter on each side. If your mass is 0.10g less than the mass of a 1-cm cube of iron, then you're just a lightweight compared to that chunk of iron. But hey, at least you're still a cube!