/// <summary>
/// Returns a new unit with the specified prefix
/// </summary>
/// <param name="prefix"></param>
/// <returns>new Unit</returns>
public Unit ChangePrefix(Prefix prefix, BaseUnit baseUnit)
{
int difference = ((sbyte)GetPrefix(baseUnit) - (sbyte)prefix) * GetPower(baseUnit);
var prefixes = new sbyte[Length];
Prefixes.CopyTo(prefixes, 0);
prefixes[(sbyte)baseUnit - 1] = (sbyte)prefix;
double quantity = Quantity * Math.Pow(10, difference);
return(new Unit(quantity, new Vector <sbyte>(prefixes), Powers));
}
