Help me with questions 3,4,5 Please

the device is called “ rocket engine”

1= 26.17

2= 1.17

3=30.86

4=5.86

just took the assigment on edge

probably not the "magnets"in the magnet, so to speak, are thought to be electrons orbiting in shells. vurrent loops two sides to the loop

in most common fires, oxygen is needed for an oxidation reaction to takes place. the combination of oxygen with any element as fuel can create fire and combustion will occur especially if wood, light materials and other combustible things are combine with oxygen.