The amount of energy released by burning a fuel source, measured in energy per mass, is called the fuel value. if all of the energy obtained from burning 1.21 lb of ethane (fuel value is 11.36 kcal/g) is used to heat 128.0 kg of water at an initial temperature of 19.2 ∘c, what is the final temperature?

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min

magnets not strong enough

explanation: