Need asap! which of the following descriptions correctly describes a way of electrical transfer? 1) electrons are transferred between a conductor and insulator by means of contact 2) protons are transferred between a conductor and insulator by means of contact. 3) insulators allow electrons to flow through an object by conduction. 4) insulators allow electrons to flow through an object by conduction.

An air standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes. 1-2 isentropic compression 100 kpa and 22°c to 600 kpa 2-3 v=constant heat addition to 1500 k 3-4 isentropic expansion to 100 kpa 4-1 p=constant heat rejection to initial state (a) show the cycle on p-v and t-s s (b) calculate the net work output per unit mass (409 kj/kg) (c) determine the thermal efficiency (47.9%)