Acurve with 0.3 m constant radius contains a bead that is moving on it such that its rotational velocity is 3t2 sec-1. if the bead had zero velocity at theta = 0, determine its vel and acc when theta (θ)= 45 degrees.

Estimate the change in specific internal energy au and specific enthalpy h from inlet to outlet for ethylene glycol (a liquid) flowing through each of the following devices: (a) a heat exchanger where the glycol temperature increases from 20 °c to 80 °c; (b) a pump operating at about 25 °c and increasing the glycol pressure from 100 kpa to 8 mpa.