Which observation provides evidence of the force that the balloons exert on each other over a distance because of their charge?The amount of rubbing with the wool cloth can change the amount of charge. Both Balloon 1 and Balloon 2 are pulled downward by the force of gravity. Moving Balloon 1 can make Balloon 2 move without the balloons touching. The charge on the balloons gets weaker over time until there is no charge.

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

Assume this car is driven off a cliff . how many arrows of force need to be drawn in the free body diagram? assume no air resistance -five -one -three -four

You can watch static electricity in action by rubbing an inflated balloon against your hair. your hair will actually stand on its end! it does this because each hair becomes charged, and they all repel one another.