Explain under what conditions the object float water surface and get submerged in water

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.

the journeys of marquette, joliet and la salle a) new france expand.

all three of these explorers explored the midwest and the area around the great lakes, which they subsequently claimed for france.

this was a big portion of territory and expanded new france which before then only consisted of quebec province in northeastern canada