Select the true statements about alpha particles.

A. Alpha particle formation is accompanied by the conversion of a neutron into a proton.
B. Alpha particles have a mass number of 4.
C. Alpha particle formation is accompanied by the conversion of a proton into a neutron.
D. Alpha particles have a nuclear charge of 1.

the higher the current the higher the mag field around it the higher the influence on the compass

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