Suppose 1 m3 of an aquifer is contaminated with toluene. Groundwater moves through at an actual speed of 0.03 m/day and the toluene has a dissolved concentration equal to 20% of its solubility. How long will pump and treat take (in years) to remove the toluene spill

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.

Which fact supports the conclusion that there will be fewer farm managers in the future? a) a farmer manager’s duties vary by the type of farm. b) farm technology is replacing some administrative jobs c) farm managers often need experience but not education. d) administrative duties include budgeting and training staff.

Which situation will produce the greatest change of momentum