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The rate of food consumption, i.e. the amount consumed during a certain period of time, is the input power. This can be measured in kcal/day or in J/s = W (1000 kcal/d ≈ 48.5 W). This input power can be determined by measuring oxygen uptake, or in the long term food consumption, assuming no change of weight.
Typical gear ratios on bicycles range from very low or light gearing around 20 gear inches (1.6 metres per revolution), via medium gearing around 70 gear inches (5.6 m), to very high or heavy gearing around 125 gear inches (10 m). As in a car, low gearing is for going up hills and high gearing is for going fast.
One standard option for the Brompton folding bicycle is to use a 3-speed hub gear (roughly a 30% difference between gear ratios) in combination with a 2-speed derailleur gear (roughly a 15% difference) to give 6 distinct gear ratios; this is an example of half-step gearing. Some Brompton suppliers offer a 2-speed chainring 'Mountain Drive' as ...
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Triathlon handlebar, Trek carbon fibre tubing frame, disc wheels, [41] chain on a 55/14 gear ratio. [42] First attempt under the new rule-set and oldest record holder at 43 years old and one day. Set new German national record. 30 October 2014: Matthias Brändle: 24: World Cycling Centre Aigle, Switzerland (altitude 380m) 51.852 (New record ...
Historian Allan Lichtman has insisted that he stands by his prediction about who will win the 2024 presidential race despite recent polls – and revealed that he has “never experienced” so ...
Cadence can be measured via various types of sensors, for example a simple reed switch and a magnet which detects one revolution each time the crank arm passes a point on the frame, or more advanced sensors based on a force sensor (e.g. pedals), torque sensor (e.g. crank arms) or other types of cycling power sensors.
vehicle-kilometre (vkm [1]) as a measure of traffic flow, determined by multiplying the number of vehicles on a given road or traffic network by the average length of their trips measured in kilometres. [2] vehicle-mile (vehicle miles traveled, or VMT [1]) same as before but measures the trip expressed in miles.