Study the heating curve shown.
which statement is best supported by the information in
the heating curve?
heating curve of a substance
temperature (0)
at segment t-u, the substance changes from a liguid
to a gas and does not change temperature.
at segment t-u, the substance changes from a gas
to a liquid and changes temperature
at segment q-r, the substance releases heat and
increases in temperature,
at segment q-r, the substance absorbs heat and
decreases in temperature.

we need to know the time interval during which the force acts. impulse of force = momentum change

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