What is one disadvantage of allowing an ecosystem to restore naturally? ( .) a.) the ecosystem would not be harmed by humans. b.) the ecosystem would restore balance quickly. c.) the ecosystem's food web would not be disturbed. d.) the ecosystem would take years to fully restore.

Directions: count the number of atoms. ar co2 na3po4 so3 nac2h3o2

Estimate of the number of stars in our galaxy

The stopwatch used by a student to measure velocity of a pulse in a slinky was of least count 0.1 second. he stops the stopwatch when a pulse has made 3 journeys from one end to the other of the slinky. he finds the seconds hand to be at 52nd division. calculate the correct time noted by him.