48. What is the mass in grams for a 1000-ml volume (1 liter) of iridium if it has a density of 22.42 g/mL?

22420g

Explanation:

Iridium is 22.42 grams for every one milliliter. We have 1000 millilitres, so 1000 x 22.42 = 22420g of iridium.

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the answer is a for sure mark brainliest i had got this right on usatestprep

(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