1: A Standard Downstream Port (SDP) USB port can charge devices with up to 500 mA of current when the computer is on (a). However, when the computer is off (b), charging over USB is not possible. Fig. 2: The Pericom PI5USBxx is a USB charging controller.. Enabling all-the-time USB charging in PCs, laptops.
Slower walking (2 miles per hour) can be advantageous for older people, cardiac patients, or people recuperating from illness. Walking at speeds of 5 miles an hour can burn as many calories as moderate jogging, but even slow walking can burn 60 to 80 calories per mile. If you are thirty to sixty-nine years old and want to evaluate your general aerobic fitness level, walk one mile as fast as you can and time yourself.
How far does the average person walk in one day? An office worker takes an average of 1,600 steps per day at an average of 2.5 feet per step for a total average distance of about 3/4-mile per day. If you're on your feet fo â¦ r work then you'd walk further per day... to around 3.5 miles daily. A person can have a sustained daily range of up to 20 miles. In the military there are force marches and with the right training and equipment a person can exceed 20 miles a day easy.