A horizontal force of 0.80N is acquired to pull a 5kg block across a table top at a constant speed. With the block initially at rest, a20g bullet is assumed to be embedded in the rock

The sample with the lowest specific heat capacity will have the greatest temperature increase. in this case, it would be platinum.

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

Answerlosing electrons;