Question

how do we identify a male frog from a female frog externally



REQUEST PLEASE DON'T GOOGLE AND GIVE THE ANSWER​

Answer 1

There's a small round disc known as the tympanum covers the ears of both male and female frogs.

Whereas on males of most frog species, the circumference of this small disc is larger than the eye of the frog. On females of most frog species, the disc's circumference is equal to the size of the frog's eye.

Answer 2

If 4 x 10 -3 J of work is done in moving  a particles carrying a charge   of 16 x 10 - 6 C from infinity to point P .What will be the potential at a point?

Solution: the potential at a point is work done to carry unit from one point to another  

                        = (4 x 10 -3 ) /(16 x 10 - 6 C) = 250 V