Amotorboat takes hours to travel going upstream. the return trip takes hours going downstream. what is the rate of the boat in still water and what is the rate of the current?

B) raising the temperature and reducing the volume of the gas.|-/ 

The answer is 4f======since electrostatic force is given by    we let f be the electrostatic force when  r = 1 m    if we let  denote the electrostatic force when the distance is decreased so that r = 0.5m, then    we established earlier that f = kq₁q₂. therefore    the force will now be 4f.