Calculate Papayas, raw calories from carbohydrates, fats and
proteins based on weight Gravels and Substrates Materials and
Substances What is troy pound per hectare? The troy pound per
hectare surface density measurement unit is used to measure area
in hectares in order to estimate weight or mass in troy pounds.
The surface density is used to measure the thickness of paper,
fabric and other thin materials.read more...» What is power
measurement? Power is defined as energy transferred from or to
an object by a force on the object per unit of time. The metric
(SI) unit of power is the joule per second. The unit has a
special name, the watt (W), after Scottish inventor and
mechanical engineer James Watt. The unit of power in the British
system is the foot-pound per second.read more...»