Determine the concentration of oxygen in the liquid phase of a covered pure-oxygen- activated sludge plant subject to 3 atm of pressure (pressure to be selected by instructor). for the purposes of this problem, neglect any reactions occurring in the system. the composition of the gas in the head space above the wastewater is 80 percent oxygen, 15 percent nitrogen, and 5 percent carbon dioxide by volume

what is the volume occupied by 40 grams of argon gas (ar) at standard conditions? what volume, in liters, is occupied by 1.5 x 1023 

gold is my favorite solid.

c) should be the answer.

(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