Cylinder contains 250 g of helium at 200 k. the external pressure is constant at 1 atm. the temperature of the surroundings is lowered by 97 k. calculate the heat lost or gained by the system in response to this change in the external temperature. express your answer in j. heat capacity for helium = 20.8 j/(mol k) molecular weight for helium = 4 g/mol

The diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

For a patient with the following pes statement and interventions, which would be the most appropriate monitoring and evaluating data? pes statement: inadequate calcium intake related to food and nutrition related knowledge deficit as evidenced by statements that the only dietary source of calcium is milk and she believes that she is lactose intolerant. patient’s nutrition prescription is for a diet providing 1200 mg calcium per day. patient was provided with in-depth nutrition education on alternative dietary and supplement sources of calcium. a. calcium intake (at subsequent visit) b. knowledge assessment by asking patient to identify food sources from menus and shopping list (at the end of the current visit) c. serum calcium (at next visit) d. both a and b e. both a and c

Why are people not able to skip a dive to the deepest part of the ocean