Bohr found experimental evidence for his atomic model by studying

a) the electron cloud
b) line spectra
c) quarks
d) atomic mass

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.

What happens when a rubber rod is rubbed with a piece of fur?

Both independent and dependent clauses