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.
a person in good physical shape can walk approximately 30 miles in a single day the average human can walk around 30 miles to 50 miles in one whole day