4
05
Ice cream is made by cooling a mixture of liquid ingredients until they freeze.
F...
4
05
Ice cream is made by cooling a mixture of liquid ingredients until they freeze.
Figure 6 shows a bowl used for making ice cream
The walls of the bowl contain a liquid coolant.
The bowl is cooled to -20 °C before the mixture is put in the bowl.
The bowl causes the mixture to cool down and freeze.
Figure 6
Inner metal surface
Liquid
coolant
-20 °C
Outer
plastic
surface
Mixture
0 5.3 Explain why the different thermal conductivities of metal and plastic are important in
the design of the bowl.
[4 marks)
Answers: 1
Physics, 22.06.2019 06:30, jordanbyrd33
Air initially at 0.75 bar, 1000 k, and occupying a volume of 0.12 m^3 undergoes two processes. process 1-2: the air is compressed isothermally until the volume is halved. process 2-3: the air undergoes a constant pressure process until the volume is halved again. assume ideal gas behavior. a) determine the mass of the air, in kg. b) the work and the heat transfer for each of the two processes, in kj. (100 kj = 1 bar . m^3)
Answers: 1
Physics, 22.06.2019 14:40, babygirl091502
The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.
Answers: 1
Mathematics, 21.05.2021 17:40