4. it was mentioned in the introduction section that the "bath tub ring" is actually the results of forming calcium, magnesium, and/or iron salts with the fatty acid salts present in the soap. a. what is the magnitude of the charge (+1, +2, or +3) on the cation of each of these metals? calcium: magnesium: iron: b. write the correct formula for the calcium, magnesium, and iron salts that would form with stearic acid, ch3(ch2)16cooh. (hint: the overall electric charge in a salt is zero). chs(ch2)16coo-na example: formula for the sodium salt of stearic acid is calcium salt: magnesium salt: iron salt:

the answer would be a

може ли да зареждате повече информация, моля

(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