Answer:
2 m
Explanation:
The displacement of any body is the shortest distance in an object's path between its initial and final point.
The ball would travel 3 m from the point of throwing then fall down 5 m to the ground. The total distance traveled is 7 m.
The displacement of the ball will be the distance from the point of throwing to the ground i.e., 2 m as it is the shortest distance between the initial and final point of the ball's journey.
 
        
             
        
        
        
Answer:
Part a)

Part b)

Explanation:
As we know that the energy of capacitor when it is not connected to potential source is given as

As we know that initial energy is given as

now we know that capacitance of parallel plate capacitor is given as

now the new capacitance when distance is changed from 3.80 mm to 1.45 mm



Now the new energy of the capacitor is given as


Part b)
Now if the voltage difference between the plates of capacitor is given constant
now the energy energy of capacitor is


now when capacitance is changed to new value then new energy is given as



 
        
             
        
        
        
Answer:
Average speed in east direction  
            
Explanation:
We have given average speed of the entire trip = 5 km/hr 
First the car 4 hours then travels 12 km in 4 hours 
So total time of the trip = 4+4 = 8 hours 
So total distance traveled in the trip 
As the car travel 12 km in 4 hours to the west 
So distance traveled in 4 hour in east = 40 -12 = 28 km 
Time in east direction = 4 hour 
So average speed in east direction 
 
        
             
        
        
        
Answer:
Blood
Explanation:
All the mentioned option will yield the same DNA for the suspect but blood, besides the DNA also contain further information that can be matched to the victim like blood group, genotype, some antibodies present and even traces of substances and disease.