Are the answers to the above questions same or different ? Why ?

Four point charges are placed at the four corners of a square in the two ways as shown in the fig. Will the electric field at the centre of the square, be the same or different in the two configurations and why?

Four point charges are placed at the four corners of a square in the two ways as shown in the fig. electric potential at the centre of the square be the same or difference in the two configurations and why?

Answer the following question- Is solder a metal?

Two springs of different lengths but otherwise identical in all respects vibrate vertically with same load.Will their time period be same or different ?

Answer the following question- Is solder an alloy?

Let log_(a)N=alpha + beta where alpha is integer and beta =[0,1) . Then , On the basis of above information , answer the following questions. The difference of largest and smallest integral value of N satisfying alpha =3 and a =5 , is

. Define the terms given below and answer the questions associated with them.Gas :Why are gases compressible and show diffusion ?