Newtons
That would normally be measured in cm. It might also be measured in dm., but this unit is not very common in daily usage.
Yes. A millimeter is simply a thousandth of a meter, which is the metric unit of length.
The English system is measured in units of yards. Meter unit length in the metric system.
Acceleration is measured in (distance) per (unit of time) squared; for example, feet/second squared in the SI (metric) system the official unit is metres/second/second or metres/(second squared)
The kilogram.
The metric unit of potential energy is the joule (J).
The metric unit for an elephant's weight is typically measured in kilograms (kg).
cenimeter
The appropriate metric unit is a kilogram.
The metric volume of a sink would be measured in litres.
The metric unit used to measure power is the watt (W). It is defined as one joule per second and is commonly used to quantify the rate at which work is done or energy is transferred.
the metre, or specifically a centimetre
Newtons
The metric volume of a sink would be measured in litres.
the area of a large estate is measured in hectares
Mass is measured in kilograms.