Children begin to use pronouns like I, me, he, she and her correctly around: One year old.
18 months old.
24 months old.
2 1/2 years old.
3 to 4 years old.

Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Amaterial that provides resistance to the flow of electric current is called a(an) (1 points)