If you really want to measure the power precisely, you mount the generator on gimbals and measure the torque with a scale on an arm. Or a big copper disk with electro magnets for drag. Or a drum (prony brake) filled with water and you measure the torque on its brake with a scale. You measure speed separately and you need both for power. Or you make a fan and spin it in air and someway you can compute the load based on the air temperature and the speed. Its harder to vary the load on the fan. Called a Baker fan. A disk brake from a train might be a good tractor prony brake too. Just measure the torque reaction on the brake mounting.
During the seal hunting season out on the Hudson Bay, polar bears absorb oils from the seals and appear yellow in color. Underneath this thick âwhiteâ fur is a black skin layer with four and a half inches of fat below that. Polar bear skin is black underneath the transparent guard hairs. Brad Josephs photo. When a polar bear is on land or on the sea ice surface the thick fur coat is what insulates the bear from the cold. However, when polar bears are swimming in water, the thick fat layer is what protects them from the frigid cold.
Inhabiting the ice and sea of the Arctic, polar bears are well-equipped for survival in a harsh environment. Two coats of fur and a thick layer of blubber help insulate the polar bearâs body from the cold, keeping its temperature at an even 37Â° C (98.6Â° F).