elect ALL the statements that are TRUE about a flame test. Note: You must select ALL the true statements to earn credit. Partial credit will not be given for partial answers. Be careful! Group of answer choices All metal cations will emit colors that are observable. The anion in an inorganic salt contributes to the color during the flame test. Different colors will have different wavelengths. The cation in an inorganic salt contributes to the color observed during the flame test. Some metal cations will emit colors that are observable.

(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