The balloon has traveled 30 meters up from the bicyclist and since it's rising 5 meters per second, 2 seconds later it will travel 10 meters higher. 2 seconds later the bicyclist will travel 20 meters away. so 10+20+30= 60 meters away from each other.
The force affects acceleration because the force is how strongly the pull/push is on an object. The mass also affects acceleration because the greater the mass, the more force it would need to be accelerated.
Answer: Force and mass
50 mL of 2.0 M of 
and 25 mL of 2.0 M of 
were mixed to make a solution
Final volume of the solution after dilution = 200 mL (given)
Final concentration of , [] = 
Final concentration of , [] = 
Using Hasselbach- Henderson equation:
![pH = pK_a+ log \frac{[salt]}{[acid]}](https://tex.z-dn.net/?f=pH%20%3D%20pK_a%2B%20log%20%5Cfrac%7B%5Bsalt%5D%7D%7B%5Bacid%5D%7D)
Substituting the values:
Hence, the 
of the final solution is 7.15.
