Why are buffers important in living organisms?
Buffers prevent pH changes in body systems

Buffers cause acids to break down food

Buffers make bases work more effectively

Buffers kill bacteria and viruses

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

The mass of a bowling ball is 10 kg and the mass of a ping pong ball is 0.015 kg. if the two objects are 5 meters apart, what is the gravitational force ?

The path of a satellite orbiting the earth causes it to pass directly over two tracking stations a and b, which are 51 miles apart. when the satellite is on one side of the two stations, the angles of elevation at a and b are measured to be 87 degrees and 84 degrees, respectively. (a) how far is the satellite from station a? (b) how high is the satellite above the ground?