What percentage of the takeoff velocity did the plane gain when it reached the midpoint of the runway?

What pressure difference is required between the ends of a 2.0-m-long, 1.0-mm-diameter horizontal tube for 40 c water to flow through it at an average speed of 4.0 m/s?

Would it be correct to say the doppler effect is the apparent change in the speed of a wave due to the motion of the source? be sure to fully explain your position using at least 3 complete content related sentences.

Which of the following equations is not balanced? n2 + 3h2 → 2nh3 a. n2 + 3h2 → 2nh3 b. mgi2 + br2 → mgbr2 + i2 c. kclo3 → kcl + o2 d. hcl + naoh → nacl + h2o