Un aparato de pistón y cilindro contiene 0.30 Kg de un gas, sus condiciones iniciales son: 0.50 m3 y 10 bar. Entonces se efectúa una expansión del gas, alcanzando un volumen final de 0.75 m 3 . Calcular la cantidad de trabajo, en kJ/kg, para los siguientes procesos cuasi estáticos: a) a presión contante. b) cuando el producto PV es contante c) cuando el producto PV2 es constante d) Compare los re procesos cuasi estático mediante un diagrama PV.

Avolcano erupts next to a grassland area in a valley. a. describe three ways in which material released by the volcano could impact the grassland area. b. describe three ways in which the grassland ecosystem could recover after a volcanic eruption.

Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s. when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?

On a mild saturday morning while people are working inside, the furnace keeps the temperature inside the building at 23degreesc. at noon the furnace is turned off, and the people go home. the temperature outside is a constant 16degreesc for the rest of the afternoon. if the time constant for the building is 3 hr, when will the temperature inside the building reach 18degreesc? if some windows are left open and the time constant drops to 2 hr, when will the temperature inside reach 18degreesc?