If you swim with the current in a river, your speed is increased by the speed of the water; if you swim against the current, your speed is decreased by the water's speed. the current in a river flows at 0.52 m/s. in still water you can swim at 1.73 m/s. if you swim downstream a certain distance, then back again upstream, how much longer, in percent, does it take compared to the same trip in still water?

11.23%

Explanation:

Lets take

Speed of man in still water =u= 1.73 m/s

Speed of flow of water = v=0.52 m/s

When swims in downward direction then speed of man = u + v

When swims in upward direction then speed of man = u - v

Lets time taken by man when he swims in downward direction is and when he swims in downward direction is

Lets distance is d and it will be remain constant in both the case

Time taken in still water

2 d= t x 1.73

t=1.15 x d sec

total time in current = 0.82 +0.44 d=1.26 d sec

So the percentage time

 Percentage time =11.32%

So it will take 11.32% more time as compare to still current.

answer; i believe the correct answer is (40,000 j) good luck

the temperature and the pressure affect solubility. temperature affects by changing the properties of the solvent. the increase in pressure increases solubility, the decrease in pressure decreases solubility.