A car travels d=10km[E] then d=20km[N] What is the displacement travelled a) 30km
b) 30km[NE]
c) 22km[NE]
d) 22km[E630N]
A boat travels west at 20km/h. The journey lasts 3hours. How far has the boat travelled? *
a) 60km
b) 60km{W}
c) 17km{W}
d) 6.6km{W}​

Suppose you have three polarizing filters, with the second at an angle of 42∘ to the first and the third at an angle of 90∘ to the first. by what perfect will the original intensity of unpolarized light be reduced to after passing through all three filters?

If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?

Consider a file currently consisting of 200 blocks. assume that the file control block (and the index block in the case of indexed allocation) is already in memory. calculate how many disk i/o operations are required for contiguous, linked, and indexed (single-level) allocation strategies, for each of the conditions listed below. in the contiguous-allocation case, assume that there is not room to grow at the beginning but there is room to grow at the end. also assume that the block information to be added is stored in memory.