The pipes transporting 30 liters/s of 2 C chilled water from an ice storage system to a building are 20 cm. in diameter. The pipes are outdoors and exposed to the wind for 100 m. a. Determine the thickness of mineral fiber insulation necessary to prevent a heat loss of less than 100 W/m of length for design conditions of a 5 m/s wind at 35 C. b. Determine the temperature drop over the 100 m length.

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.

Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?