A uniform beam weighing 1 N is used as a metre rule. The beam is supported by a pivot at the 30 cm mark. A 12 N weight is hung at the 0 cm mark and a 2 N weight is hung at the
60 cm mark as shown in Figure 5.19.
50 cm 60 cm
100 cm
Ост
► Figure 5.19
30 cm
mark
1N
2 N
12 N
w
What is the weight W of a mass hung at the 100 cm mark in order to balance the beam?
Please help!

2kg of refrigerant 134a undergoes a polytropic process in a piston-cylinder assembly from an initial state of saturated vapor at 2 bar to a final state of 12 bar, 80 degree c. a)determine the work for the process in kj. b)sketch the process on a p-v diagram.

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