1. the media is for how society is viewed. a. phychological profile b. personal identity kit c. looking-glas d. master profile 2. how do media images teach us about gender? a. advertisements targetting young boys in indoor settings potray them as cooperating. b. adult advertisements are used to spell products along gender lines. c. in movies and television, amle charachters are not constucted to be more important than female chatacters. d. on average, we are exposed to fewer thaan 20,000 commericals a year. 3. the differnece in the goals of working-class parents and middle-class parents in rearing their children can be related to a. the parents' income. b. the family's neighborhood. c. opportunities presented thoroughout the life course. d. occupational differences.

As part of an industrial process, air as an ideal gas at 10 bar, 400k expands at steady state through a valve to a pressure of 4 bar. the mass flow rate of air is 0.5 kg/s. the air then passes through a heat exchanger where it is cooled to a temperature of 295k with negligible change in pressure. the valve can be modeled as a throttling process, and kinetic and potential energy effects can be neglected. (a) for a control volume enclosing the valve and heat exchanger and enough of the local surroundings that the heat transfer occurs at the ambient temperature of 295 k, determine the rate of entropy production, in kw/k. (b) if the expansion valve were replaced by an adiabatic turbine operating isentropically, what would be the entropy production? compare the results of parts (a) and (b) and discuss.

The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5. what is the specific heat ratio? show the math steps .

The coulomb's law explains which of the following? select all the force between two charged objects is inversely proportional to the charge on each object. the force between two charged objects is directly proportional to the charge on each object. the force between two charged objects is directly proportional to the distance separating them. the force between two charged objects is inversely proportional to the square of the distance separat coulomb's law is similar to newton's 2nd law. if the force between two objects is f and the charge on both objects is doubled, the new force between the would now be 2f. if the force between two objects is 2f and the distance separating them is doubled, the new force between the objects would now o the be zf.