Question

Program 2 Wap to assign the values 7 and 5 to two different variables and then interchange ther (using third variable)​

Answer 1

Explanation:

Potential energy of an object always defined with respect to reference point. If location of reference point changes, there is a possibility that potential at that point would change.

In general, we write the potential energy of an object at a height h from earth surface U=mgh. Here we take earth surface as a zero potential level or reference point.

Answer 2

Answer:

(using java)

class swap

{

void main()

{

int a=7,b=5,c;

c=a;

a=b;

b=c;

System.out.println("a="+a);

System.out.println("b="+b);

}

}