12 MEDICAL DEVICE REGULATIONS In Canada, devices of classes III and IV are subject to in-depth regulatory scrutiny,while class II devices require only the manufacturerâs declaration of device safety andeffectiveness before sale.
No problem: Polar bears in the study were seen swimming distances of 90 miles without any problems - and some bears went a lot further Scientists discovered that during the summer months, when sea ice is at its minimum, the bears were swimming farther and for longer periods of time than ever before in search of new hunting grounds.
Walking bears expend 13 times more energy than resting bears. This partly explains their preference for still-hunting, which usually involves a long, patient wait for a seal to surface at a breathing hole in the sea ice. Running. Polar bears can run as fast as 40 kilometers per hour âbut only for short distances.