You are about to view and experiment to find out whether a ball that is heavy will roll
down a ramp faster and continue to roll further than a lighter ball. before viewing it,
give your well-stated hypothesis about what will happen.
remember: a good hypothesis can be thought of as a guess, supported by reasoning
and worded as an if/then statement.

Alice added sodium chloride to water and stirred the water for several minutes. alice is most likely trying to demonstrate that ionic compounds a. are hard. b. can dissolve. c. are clear. d. can melt.

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

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects