Q2: A calender having rolls of diameter 0.3 m produces plastic sheet 1 m wide at the rate of 2000 kg/hour. If the roll speed is 5 rev/minute and the nip between the rolls is 4.5 mm, estimate the position and magnitude of the maximum pressure. The density of the material is 1400 kg/m3 and its viscosity is 1.5 x 104 Ns/m 2 . (20 Marks)

Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30newtons what must the input force be

Which best describes the difference between internal and thermal energy?

Along wire of diameter 1 mm is submerged in an oil bath of temperature ∞ 31°c. the wire has an electrical resistance per unit length of 0.01 ω/m. if a current of 103 a flows through the wire and the convection coefficient is 500 w/m2·k, what is the steady-state temperature of the wire? from the time the current is applied, how long does it take for the wire to reach a temperature that is within 1°c of the steady-state value? the properties of the wire are 8000 kg/m3, 500 j/kg·k, and 20 w/m·k.