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-- The quantity 'RC' has the physical dimensions of Time. -- If the capacitor is charging through a resistor, then 'RC' is the time it takes to charge up to (1 - 1/e) of the voltage it still has to go to become fully-charged. -- If the capacitor is discharging through a resistor, then 'RC' is the time it takes to discharge to 1/e of its present voltage. -- ' e ' is the base of natural logarithms, approximately 2.71828... -- 'RC' is called the 'time constant' of the resistor/capacitor combination.
120 m
The cost of an RC Plane depends entirely on quality of it, the cheapest ones are often found in the $100-$200 range, with sales putting them as low as $50-80 from time to time.
The Marlin 336 RC 32 Special rifle with lever action is offered for sale at prices between $350 and $450. The price depends on the condition of the rifle and any accessories that may come with it.
C = 2Ï€rC = 2Ï€ * 12.5C = 25Ï€ or 78.5398 feet.