19. Allie takes 112.12 minutes to swim 2.4 miles, 401 minutes to bike 112 miles, and 642.9 minutes to run 26.2 miles. Which shows her total time with the correct
number of significant digits?

That depends on what kind of environ meant it is in  in space it has the same force that was applied when the velocity was gained

Sorry i don’t know what to do

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.

What kind of enegia produces the mixture of bicarbonate and vinegar  chemical producetion