Which of the following would be considered basic science questions?
a. how can cars be made safer?
b. what is the best way to improve a gas engine?
c. why do many birds have colorful feathers?
d. what are the stages in the life cycle of a star?

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