The composition of PBS is 0.137M, NaCL, 0.012M Phosphate,0.0072M KCL, PH7.4.Below is the protocol of making 1x liter 10x concentrate PBS:combine the following 80g NaCL 2g KCL,14.4g Na, HPO,2.4g KHPO4,800mil distilled water.1)adjust ph to 7.4 with HCL 2)Add H2O to 1 liter 3)autoclave for 20minutes on a liquid cycle. store at room temperature

pie chart because it is in percents ( % )

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8

(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