Measuring acceleration requires appropriate units. which unit is used to measure acceleration?
a: m/s
b: n
c: m/s2
d: kg·m/s

Meters per second per second
              or
Meters Per Second Squared
              or
(m/s)(m/s) (its squared but  i cant really type that, sorry)

Ch4 is nonpolar and insoluble in water. since all of the hydrogen atoms are evenly spread around the carbon atom even through the c h bond is polar all the poles cancel each other out.