The velocity of the water in the pipe shown in Fig. P4.14 is given by V1 = 0.50t m/s and...

The velocity of the water in the pipe shown in Fig. P4.14 is given by V₁ = 0.50t m/s and V₂ = 1.0t m/s, where t is in seconds. (a) Determine the local acceleration at points (1) and (2). (b) Is the average convective acceleration between these two points negative, zero, or positive? Explain.