19. A person pushes with 6.0 N for 4.0 seconds on a 2.0 kg object.
A) What is the impulse on the object?

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?

What are two examples of phase changes that skip a phase during transition?

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%)