1. using graph a calculate the average speed of the object in motion from 12s to 20s. explain your calculation.

2.compare graph a and b, which graph shows a greater velocity at 5s and 10s
describe how you know.

in s-t graphs,tanα=distance /time

200/8=28ms^-1

in graph A, in 5s-25ms^-1

in 10s-0 ms^-1

in graph B.,in 5s-4ms^-1

in 10s-20ms^-1

so in 5s A has greatest velocityin 10s B has greatest velocity

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

hello, i am papaguy.

i have found an answer to your question but use it as information.

information: because weak acids/bases have low concentration of hydrogen ions, the addition of water has a large impact on the ph. 2. a difference in 1 unit is a 10x difference in concentration for example; a liquid with ph of 3 is 10x more acidic than a liquid with a ph of 4. therefore, a liquid with a ph of 3 is stronger.

best of luck!