3. Arrange the following substances in order of increasing acidity: vinegar (pH = 2.8), gastric juices
from inside your stomach (pH = 2.0), and a soft
drink (pH = 3.4).

Aparticle initially located at the origin has an acceleration of = 2.00ĵ m/s2 and an initial velocity of i = 8.00î m/s. find (a) the vector position of the particle at any time t (where t is measured in seconds), (b) the velocity of the particle at any time t, (c) the position of the particle at t = 7.00 s, and (d) the speed of the particle at t = 7.00