What portion of the compound copper carbonate CuCO3 is a covalently bonded polyatomic ion? A. CO3
B. O
C. C
D. Cu

It's A

If an object with an initial temperature of 300 k increases its temperature by 1°c every minute, by how many degrees fahrenheit will its temperature have increased in 10 minutes? (a) 6°f (b) 10°f (c) 18°f (d) 30°f

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.

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.