Which circumstances could be sources of error within the experiment? check all that apply. not fully submerging the object when doing the fluid displacement procedure water that is left behind in the collection container when it is transferred for measurement water that soaks into the materials of the balls, affecting the mass in repeated trials the time of day when the measurements are recorded water in the bucket, approximated to the closest 10 ml due to surface tension at the top of the bucket the air pressure in the room and its affect on the scales that measure the mass of each object

explanation:

one person pulls 90n one way and the other has 100n pulling the other way.

so the net force = 90 - 100 = -10n,

or the ans can be 10n if the picture shows -90n and 100n instead.

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