Given the task definition and input, reply with output. Compose a new way to ask the same question. The new question must be asking the exact same thing as the original question does. Without any other information, you should be able to tell that the original question and the new question are the same. Preserve bracketed phrases in your new question. You can change the rest of the question provided the above requirements are satisfied. The new question must have a natural, fluent formulation, as if it were composed by a native English speaker. You will be given three pieces of information to help you create better questions. Those are: "Answer": the answer to the question, e.g., "Honolulu". "Answer Type": the type of the answer, e.g., "Location". "Auxiliary Information" is a detailed description of some concepts mentioned in the question, if any.

original question: What is the charge unit in the measurement system which has [Radian per second]?
answer: coulomb
answer type: Unit of Charge.
auxiliary information: The radian per second is the SI unit of rotational speed, commonly denoted by the Greek letter . The radian per second is also the unit of angular frequency. The radian per second is defined as the change in the orientation of an object, in radians, every second. Note that because the radian is a dimensionless unit, the radian per second is dimensionally equivalent to the hertzboth are defined as one s1. This means that great care must be taken to avoid confusing angular frequency and frequency . One of the important uses of the unit radian per second is in calculation of the power transmitted by a shaft. In the International System, widely used in physics and engineering, the power, p, delivered to the shaft is given by the product of times the torque, , in newton-meters applied to the shaft. Thus, p = , and the unit is the watt, with no numerical coefficient needed. In other systems, the calculation is somewhat more complicated, because if one multiplies angular velocity in revolutions per minute times the torque in pound-feet, then a multiplicative constant is needed to give the result in horsepower.
What is the charge unit used to measure [Radian per second]?