21. A particle rests on the top of hemisphere of radius 'r'. It begins to slide without friction
down the smooth surface of hemisphere and
leave the surface of hemisphere at height 'h'
above ground making angle with vertical.
The value of O is

Asmall, positively charged ball is moved close to a large, positively charged ball. which describes how the small ball likely responds when it is released? it will move toward the large ball because like charges repel. it will move toward the large ball because like charges attract. it will move away from the large ball because like charges repel. it will move away from the large ball because like charges attract.

What changes occur in the brain during the teenage years? 25 points, someone me out!a.) thinking becomes slower as the brain grows larger. b.) connections between neurons become stronger and faster. c.) unused neurons fuse together to form larger, better functioning neurons. d.) more neurons are developed.

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?