Some authors distinguish between a natural experiment and a quasi-experiment. The difference is that in a quasi-experiment the criterion for assignment is selected by the researcher, while in a natural experiment the assignment occurs 'naturally,' without the researcher's intervention. Quasi-experiments have outcome measures, treatments, and experimental units, but do not use random assignment.
Simple Electrical Circuit with a Bulb, some Wire and a Battery. A guide to the basics of electricity. Here is everything you need to know about electrical power (Watts), current (Amps) and voltage (Volts), how to understand simple electricity and the way these parameters relate to one another. Lets begin with some simple definitions:
You can calculate amps from volt-amps and volts, but you can't convert volt-amps to amps since volt-amps and amps units do not measure the same quantity.