40 new students come to a class each year. At the end of the year, 10% of the students leave the school, 30% stay in the class and repeat the next year, and 10% stay at the end of the second year and repeat the course. a) Set up the differential equation.
b) Determine the transfer function of the system.
c) How many students will be in the classroom after 5 years?
d) What will be the maximum number of students in the class?

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