Please help R1 = 50.0 Ohm and
R2 = 80.0 Ohm. They are
connected in series with a third
resistor, R3, and the total
resistance of the combination is
200 Ohm.
What is the value of R3?
(Unit = Ohm)
No links please

In an experiment, how can i change human errors? be specific.

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.

2) a cubical block of stone is lowered at a steady rate into the ocean by a crane, always keeping the top and bottom faces horizontal. which one of the following graphs best describes the buoyant force b on this block as a function of time t if the block just enters the water at time t = 0 s?