______ is neither created nor destroyed, it can only changed one form to another.
mass of body `square`
heat `square`
work `square`
energy `square`

Is friction is same for all the surfaces? YES square NO square Can't Say square None of These square

Which one is good conductor____ silicon square graphite square ebonite square none of the above. square

Two positive charges of magnitude 'q are placed at the ends of a side (side 1) of a square of side '2a'. Two negative charges of the same magnitude are kept at the other corners. Starting from rest, if a charge Q moves from the middle of side 1 to the centre of square, its kinetic energy at the centre of square is

can we reduce friction to zero by using lubricants? Yes square No square Can't Say square None of these square

Prove that the quadrilateral formed by joining the mid-points of the sides of a square is also a square.

It is safe to do electrical work standing on a wooden stool because it is ______ good conductor square preventive square bad conductor square none of the above. square

x and y are the sides of two squares such that y=x-x^2 Find the rate of change of the area of the second square with respect to the first square.

Answer any one : If in a triangle, the area of the square drawn on one side is equal to the sum of the areas of the squares drawn on other two sides, then prove that the angle opposite to the first side will be a right angle.

The work done required to put the four charges together at the comers of a square of side a, as shown in the figure is

Find the number of ways in which we can choose 3 squares on a chess board such that one of the squares has its two sides common to other two squares.