You have to figure it out
        
             
        
        
        
Answer: You can betterly understand what's around you and how it works
 
        
             
        
        
        
<u>Weight = (mass) x (acceleration of gravity)</u>
Divide each side by (mass),and we have
                     Acceleration of gravity = (weight) / (mass)
Acceleration of gravity = 2,970/90 = 33 newtons per kilogram = <em>33 m/s²</em>
        
             
        
        
        
Explanation:
When the wire is connected to a battery, the compass needle moves and changes its position. This happens because the needle magnetizes the copper wire, thus,  creating a force. 
While the current in the wire produces a magnetic field and exerts a force on the needle. The insulation on the wire becomes energized and exerts a force on the needle. Hence, the compass needle moves and changes its position.