Chemistry determines the cell voltage (1.2V or 1.5V and there are others like Lithium at 3.0V), whether the battery is rechargeable, and how the voltage changes as the battery discharges i.e. at what voltage is the battery considered to be flat or fully charged. Switched mode power supplies. One more point.
The Average Bike Riding Speed. The average road bike speed is between 11 and 12 mph. Bike riding speeds vary widely depending on your riding conditions. When you are zooming down a paved hill, your speed may increase to over 20 mph, while you may slow to only a few miles per hour when you are climbing a steep or rocky grade.
As you ride the bike, your heart rate should be within your target zone, which is 50 to 85 percent of your maximum heart rate. Your maximum heart rate is 220 minus your age. For example, a person who is 35 years old has a maximum heart rate of 185 beats per minute and a target heart rate of 93 to 157 beats per minute.uring many forms of exercise, it's necessary to find your pulse and count the beats to determine your heart rate. But when you use a stationary bike, the machine might be equipped with a heart-rate sensor.