After they are all used up they can’t be renewed or used anymore.
Answer:
A north magnet attracts a south magnet
Explanation:
The opposite polar magnetic field will attract each other while the same polar magnetic fields will repel each other.
Answer:
Explanation:
1. All screws give the same M.A.
False - it depends on screw size and threads
2. A screw does its job by moving.
True - as far as screw as a machine
3. A screw with more threads has a smaller M.A.
False - more threads increase output force i.e. higher MA
4. Screws can be used to move things. *
True
