The current through a particular circuit element is given by i(t) = 5 sin(200pt) A
in which the angle is in radians. a. Sketch
i(t) to scale versus time. b. Determine the
net charge that passes through the element
between t = 0 and t = 5 ms. c. Repeat for
the interval from t = 0 to t = 10 ms.

Apiping systems consists of 6 m of 6-std type k and 12 m of 4-std type k, both drawn copper tubing. the system conveys ethylene glycol at a rate of 0.013 m3/s. the pressure drop across the system is to be calculated. there are two 90° elbows in the 6-in pipe, a reduction from the 6-in pipe to the 4-in pipe and four 90° elbows in the 4-in pipe. all fittings are soldered (same as flanged) and regular. the inlet and outlet of the system are at the same height.