Waves in a lake are 5.00m in length and pass an anchored boat 1.25 s apart. the speed of the waves is: a. 0.25 m/s
b. 4.00 m/s
C. 6.25 m/s
d. 3 × 108 m/s​

Jenny places a strip of ph paper into a solution. when she removes the ph paper, it has turned yellow-green. what should jenny do next to determine the ph of her solution? a. use a different testing method because the ph paper should not change colors b. place the ph paper into a machine that reads the ph of the solution c. compare the ph paper's color with the color of ph paper from another solution d. compare the ph paper's color with a chart of colors and ph ranges