Stepper motors are a type of motor frequently used when precise rotations are required. In a stepper motor an internal rotor containing PMs or a magnetically soft rotor with salient poles is controlled by a set of external magnets that are switched electronically. A stepper motor may also be thought of as a cross between a DC electric motor and a rotary solenoid. As each coil is energized in turn, the rotor aligns itself with the magnetic field produced by the energized field winding. Unlike a synchronous motor, in its application, the stepper motor may not rotate continuously; instead, it "steps"—starts and then quickly stops again—from one position to the next as field windings are energized and de-energized in sequence. Depending on the sequence, the rotor may turn forwards or backwards, and it may change direction, stop, speed up or slow down arbitrarily at any time.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"):  When are stepper motors least useful?
Ah, so.. unanswerable

Individual states and localities offer nonprofits exemptions from other taxes such as sales tax or property tax. Federal tax-exempt status does not guarantee exemption from state and local taxes, and vice versa. These exemptions generally have separate applications and their requirements may differ from the IRS requirements. Furthermore, even a tax exempt organization may be required to file annual financial reports (IRS Form 990) at the state and federal level. A tax exempt organization's 990 forms are required to be made available for public scrutiny. An example of nonprofit organization in the US is Project Vote Smart.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What must IRS 990 forms be available for?
Ah, so.. unanswerable

The British Isles lie at the juncture of several regions with past episodes of tectonic mountain building. These orogenic belts form a complex geology that records a huge and varied span of Earth's history. Of particular note was the Caledonian Orogeny during the Ordovician Period, c. 488–444 Ma and early Silurian period, when the craton Baltica collided with the terrane Avalonia to form the mountains and hills in northern Britain and Ireland. Baltica formed roughly the northwestern half of Ireland and Scotland. Further collisions caused the Variscan orogeny in the Devonian and Carboniferous periods, forming the hills of Munster, southwest England, and southern Wales. Over the last 500 million years the land that forms the islands has drifted northwest from around 30°S, crossing the equator around 370 million years ago to reach its present northern latitude.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): In which direction have the British Isles been drifting?
Ah, so..
northwest