25. which of the following is represented in the highest percentage by volume in dry air?
a. carbon dioxide
b. hydrogen
c. nitrogen
d. oxygen

11. you want to calculate the displacement of an object thrown over a bridge. using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before hitting the water?

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

What are the three ways that an object can accelerate