A horizontal line on the velocity vs. time graph indicates a constant, positive
acceleration
A. True
B. False

False

Explanation:

When the line is horizontal in a graph of velocity vs time, it implies that the velocity is constant as time keeps moving. Whenever the velocity is constant then it means there is no change in velocity. Since acceleration is rate of change of velocity per unit time, then here acceleration is zero.

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

i would think it's food chain