. Find the change in thermal energy of a 20-kg wooden chair that warms from 20°C to 55°C if the specific heat of the wood is 700 J/(kg°C).

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

Carbon dioxide because it consists of one type of molecule.

Idon't know the answer to this question

32 degrees celsius is 89.6 degrees fahrenheit so 50.22 degrees celsius are needed for it to be 212 degrees fahrenheit