Assignment A drop of water of mass 0.2g is placed beforeen two
glass plates. The distance between them is 0.01cm. Find the force of attraction between the plates. If surface tension of water= 0.07N/m. [g=10m/s^2].

Arod of some material 0.20 m long elongates 0.20 mm on heating from 21 to 120°c. determine the value of the linear coefficient of thermal expansion [in (degrees c)^-1] for this material.

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

If the chemical properties of a substance remain unchanged and appearance or shape of a substance changes it is called a ?