Which is a physical property of milk?
milk has a ph ranging from 6.4 to 6.8.
milk spoils when left unrefrigerated over several days
milk boils at about 212 f (100 c)
milk curdles when mixed with vinegar

Milk boils at about 212 F (100 c)

Explanation:

A physical property is a property in which a chemical change is not nessecary to undergo to know about.

Since all the other options require a chemical change to know, they are not physical properties.

The third option is a physical property because it does not require a chemical change to know.

(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

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explanation:

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