Answer:

Explanation:
= Mass of Bonzo
= Mass of Ender
= Initial Velocity of Bonzo = 2.2 m/s
= Initial Velocity of Ender = -2.6 m/s
From conservation of linear momentum


Answer: D. Infrared
Infrared is the best way to observe it.
Answer:
this is a law because it is a constant fact of nature
Explanation:
D. Speed and direction, this is because velocity is a vector quantity so has a magnitude and direction assigned to it because it is the rate of change of displacement.