Answer:
you are making an observation that uses numbers.
Explanation:
Answer:
yes it does exert a force, it pushes it up
Explanation:
this is called normal force
if it didn't exert a force the book would keep going down
according to newton every force has an equal amd opposite reaction
so the book exerts a force on the table and vice versa
hope this helped
1) neutral
2) acidic
3)basic
4) basic
Answer:
True
Explanation: In pulley's , length of cables doesn't change.