Un cilindro metálico está cerrado por un émbolo y contiene aire a 0 ºC y presión 912 mm Hg cuando el émbolo está a 50 cm del fondo del cilindro. Si a temperatura constante el émbolo se mantiene a 30 cm del fondo la presión del interior del cilindro es (1 atm = 760 mm Hg)

According to social exchange theory, altruistic behaviors benefit the individual who performs them.

Asmall, positively charged ball is moved close to a large, positively charged ball. which describes how the small ball likely responds when it is released? it will move toward the large ball because like charges repel. it will move toward the large ball because like charges attract. it will move away from the large ball because like charges repel. it will move away from the large ball because like charges attract.

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.