In a particular run of the “archimedes principle” experiment a particular unknown substance is found to have a “dry mass” of 4.5 grams while the “wet mass” is 4.25 grams. a.) what is the density of the substance? b.) what is the objects volume?

Aparticle moves in the xy plane with constant acceleration. at time zero, the particle is at x = 6 m, y = 8.5 m, and has velocity ~vo = (9 m/s) ˆı + (−2.5 m/s) ˆ . the acceleration is given by ~a = (4.5 m/s 2 ) ˆı + (3 m/s 2 ) ˆ . what is the x component of velocity after 3.5 s? answer in units of m/s.