The following points are given:

x 1 2.2 3.7 6.4 9 11.5 14.2 17.8 20.5 23.2
y 12 9 6.6 5.5 7.2 9.2 9.6 8.5 6.5 2.2

(a) Fit the data with a first-order polynomial. Make a plot of the points and the polynomial.
(b) Fit the data with a second-order polynomial. Make a plot of the points and the polynomial.
(c) Fit the data with a third-order polynomial. Make a plot of the points and the polynomial.
(d) Fit the data with a fifth-order polynomial. Make a plot of the points and the polynomial.

Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)

Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg.k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m.k