You can only carried forward any loss over $3,000, not carry over $3,000. You would claim your $20,000 losses in 2013. However, only $3,000 would be deductible. The remaining $17,000 in losses would carry forward to 2014.
The answer is 0.0166666666667. We assume you are converting between hertz and RPM. The SI derived unit for frequency is the hertz. 1 hertz is equal to 60 RPM. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between hertz and RPM. Type in your own numbers in the form to convert the units! You can do the reverse unit conversion from RPM to hertz, or enter any two units below: I'm feeling lucky, show me some random units.
An original equipment alternator will put out between 60 and 120 amps at 2000 rpm. Let's assume that the headlights, fans, and radio are all on and using up half of this power. So in this worst-case example it is going to take about 20x the amount of time spent cranking or about 10 minutes to replenish the battery. In more realistic scenarios the starting load will be much less as will the cranking time, and the energy used to start the car will be returned to the battery in a minute or two.