Which is the answers? A. Glass
B. Copper
C. plastic
D. Wood

please give me explanation for ur answer and please be logical ​

The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race

Ahot-air balloonist, rising vertically with a constant speed of 5.00 m/s releases a sandbag at the instant the balloon is 40.0 m above the ground. after it is released, the sandbag encounters no appreciable air drag. compute the velocity of the sandbag at 0.250 s after its release.

How do we measure or think of speed in the united states?