What is the total heat gained by an 8 gram piece of iron that increases in temperature by 6 c

21.6 Joules

Explanation:

Q= heat gained

m= mass of the substance = 8g

c = heat capacity of  iron= 0.45 J/g ° C    

Q= 21.6 Joules

Thus heat gained by 8 g of iron is = 21.6 Joules

answer; i believe that the correct answer is(d) nondisjunction during meiosis;

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.