A simple viscometer consists of concentric cylinders of height h and radii R1 and R2, where R2 > R1. The inner cylinder rotates at an angular frequency ! and the volume between the two cylinders is filled with a fluid of viscosity ⌘. Derive an expression for the torque on the outer cylinder.

Apossible long term health effects of stress would be work

This is what a calorimeter is used for simpler ex, to measure calories in food.

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current