2. On a frictionless air track, a 0.15 kg glider moving at 1.2 m/s to the right collides with and sticks to a stationary 0.25 kg glider. What is the net momentum of this two-glider
system before the collision?

With these questions , 15 pts & brainliest

What does si stand for, when referring to a system of measurement

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.