Answer:
Definitely Spinning permanent magnets within an array of fixed permanent magnets
Explanation:
Any relative motion between magnets (be they permanent or electromagnetic) and a coil of wire will induce an electric current in the coil.
What will not induce an electric current is the relative motion between the two coils of wire (because there is no change in magnetic field), or the relative motion between two magnets (there are no coils of wire to induce the current into).
<em>Therefore, spinning permanent magnets within an array of fixed permanent magnets does not induce an electric current.</em>
 
        
                    
             
        
        
        
Explanation:
It is given that,
Mass of the box, m = 100 kg          
Left rope makes an angle of 20 degrees with the vertical, and the right rope makes an angle of 40 degrees.  
From the attached figure, the x and y component of forces is given by :






Let  and
 and  is the resultant in x and y direction.
 is the resultant in x and y direction.


As the system is balanced the net force acting on it is 0. So,
 .............(1)
.............(1)
 ..................(2)
..................(2)
On solving equation (1) and (2) we get:   
 (tension on the left rope)
 (tension on the left rope)
 (tension on the right rope)
 (tension on the right rope)
So, the tension on the right rope is 1063.36 N. Hence, this is the required solution.                             
 
        
             
        
        
        
Answer:
<em>Hewo Otaku Kun Here! (UwU)</em>
Explanation:
1. A rock sitting at the edge of a cliff has potential energy. If the rock falls, the potential energy will be converted to kinetic energy.
2. Tree branches high up in a tree have potential energy because they can fall to the ground.
3. A stick of dynamite has chemical potential energy that would be released when the activation energy from the fuse comes into contact with the chemicals.
4. The food we eat has chemical potential energy because as our body digests it, it provides us with energy for basic metabolism.
5. A stretched spring in a pinball machine has elastic potential energy and can move the steel ball when released.
6. When a crane swings a wrecking ball up to a certain height, it gains more potential energy and has the ability to crash through buildings.
7. A set of double "A" batteries in a remote control car possess chemical potential energy which can supply electricity to run the car.
<em>happy to help!</em>
<em>from: Otaku Kun ^^</em>
 
        
             
        
        
        
Answer:
Heat
Explanation:
Because chemical energy is stored, it is a form of potential energy. When a chemical reaction takes place, the stored chemical energy is released. Heat is often produced as a by-product of a chemical reaction – this is called an exothermic reaction.
Hope this helped.