The displacement of the bird is 1.8 km...because displacement is the distanse of the object from mean position to the travelled position.....hope it helps
        
                    
             
        
        
        
Answer:
Part a)

Part B)

Explanation:
Part A)
As we know that the point A lies on the top of the loop 
so we will have by energy conservation

so the speed at point A is given as




Part B)
Now the force equation at point A is given as

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Answer:
polystyrene is a good insulater so less heat will escape from the cup and it will keep it warm.
the cup helps it become more insulated 
 
        
             
        
        
        
We are asked in what manner can one make the motor run in reverse. One way to do so is to flip the magnet on the other side so that the opposite charge faces to the motor. The magnetic field induced by the magnet to the motor results to a reactive force opposite to the induced motion. 
        
             
        
        
        
This means that two objects will reach the ground at the same time if they are dropped simultaneously from the same height. ... When air resistance plays a role, the shape of the object becomes important. In air, a feather and a ball do not fall at the same rate.