Question: Read this and answer the question

A servomotor is a motor, very often sold as a complete module, which is used within a position-control or speed-control feedback control system mainly control valves, such as motor-operated control valves. Servomotors are used in applications such as machine tools, pen plotters, and other process systems. Motors intended for use in a servomechanism must have well-documented characteristics for speed, torque, and power. The speed vs. torque curve is quite important and is high ratio for a servo motor. Dynamic response characteristics such as winding inductance and rotor inertia are also important; these factors limit the overall performance of the servomechanism loop. Large, powerful, but slow-responding servo loops may use conventional AC or DC motors and drive systems with position or speed feedback on the motor. As dynamic response requirements increase, more specialized motor designs such as coreless motors are used. AC motors' superior power density and acceleration characteristics compared to that of DC motors tends to favor PM synchronous, BLDC, induction, and SRM drive applications.

What factors limit performance of servo motors?
Answer: winding inductance and rotor inertia
Question: Read this and answer the question

Coordinative definition has two major features. The first has to do with coordinating units of length with certain physical objects. This is motivated by the fact that we can never directly apprehend length. Instead we must choose some physical object, say the Standard Metre at the Bureau International des Poids et Mesures (International Bureau of Weights and Measures), or the wavelength of cadmium to stand in as our unit of length. The second feature deals with separated objects. Although we can, presumably, directly test the equality of length of two measuring rods when they are next to one another, we can not find out as much for two rods distant from one another. Even supposing that two rods, whenever brought near to one another are seen to be equal in length, we are not justified in stating that they are always equal in length. This impossibility undermines our ability to decide the equality of length of two distant objects. Sameness of length, to the contrary, must be set by definition.

The second feature of Coordinative definition involves what?
Answer: separated objects
Question: Read this and answer the question

In 1584, Elizabeth I granted a charter to Sir Walter Raleigh, for whom the state capital is named, for land in present-day North Carolina (then part of the territory of Virginia). It was the second American territory which the English attempted to colonize. Raleigh established two colonies on the coast in the late 1580s, but both failed. The fate of the "Lost Colony" of Roanoke Island remains one of the most widely debated mysteries of American history. Virginia Dare, the first English child to be born in North America, was born on Roanoke Island on August 18, 1587; Dare County is named for her.

What year did Elizabeth I grant the charter to Raleigh to travel to North Carolina?
Answer:
1584