According to Dalton, an atom _[blank]_. Which option correctly completes this statement?

is indivisibleis indivisible , ,

consists of smaller partsconsists of smaller parts , ,

cannot combine with other atomscannot combine with other atoms , ,

is mostly empty space

What kind of waves require a medium to travel? question 6 options: light waves mechanical waves all waves need a medium to travel electromagnetic waves

Aheavy boy and a lightweight girl are balanced on a massless seesaw. the boy moves backward, increasing his distance from the pivot point. what happens to the seesaw? it is impossible to predict without knowing additional information. the side the boy is sitting on will tilt downward. the side the girl is sitting on will tilt downward. nothing; the seesaw will remain balanced.

What are the examples for scaler quantities