A boy sits motionless partway down a playground slide the force of friction balances the force of gravity a girl hands the boy a book why does the boy still not move ?

Ineed asap! list 3 examples in which friction us or makes things easier in our daily life. explain the effect of friction for each. *make sure you explain the effect of friction for each example! *

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

Identify some abiotic characteristics of the tundra biome.