Scientists are experimenting with a king of gun that may eventually be used to fire payloads directly into orbit. in one test, this gun accelerates a 5.0kg projectile from rest to speed of 4.0 x 10^3 m / s. the net force accelerating the projectile is 4.9 x 10^5n. how much time is required for the projectile to come up to speed?

This is the substance(s) formed in a chemical reaction.

Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two

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.