Many galaxies gravity source is in the form of black holes true or false

The answer is True. Hope this helped

All gravity is always the result of mass. Sone of the mass of a galaxy may be in the form of black holes that reside in it.

The gravity of a black hole is exactly the same as the gravity of the same amount of mass in any other form.

the answer is a. hope this .

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