18.Consider the path shown on the PV diagram Hide Elapse ns The work done on the

Question

18.Consider the path shown on the PV diagram Hide Elapse ns The work done on the system going from A to B is positive O Its sign cannot be determined from the information given in the diagram zero negative 19.A drinking glass is floating in a larger container of water. I have an iron weight. In which of the following two cases will the water in the larger container rise the most? O I put the weight into the floating glass. (The glass remains floating after the iron weight is put into it.) l put the weight directly into the water. amount O Both of these will cause the water to rise the same 20. Two blocks are made of different kinds of wood. Both blocks have the same weight. They both float on water. If the density of the first block is greater than the second, the first block will displace the second block. more water than the same amount of water as 0 less water than

Explanation / Answer

18) (a) positive

Work done is given as the product of pressure and the change in volume.

In the given diagram, change in volume is positive and hence work done is positive.

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