Which one of the following groups of chemical compounds is composed entirely of organic compounds?
a. c2h4o, ch2o, caso4
, c3h5
(oh)3
b. c2h2
, ch4
, cacl2
, cacn2
c. ch3och3
, ca3
(po4
)2
, co2
, h2co3
d. c6h6
, c2h5oh, c6h5ch3
, c3h5
(no3
)3

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied