A projectile is launched horizontally at a speed of 45.0 m/s from a height of 65 meters.
How much time will it take the projectile to hit the ground??

45 seconds
9.2 seconds
1.5 seconds
3.6 seconds

How many molecules are present in 3 mols of silicon dioxide (sio2)?

Jessie ran 5000 meters from the cops and an average speed of 6 meters / second before he got caught . how long did he run?

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.