Compressibility of oil is 20 × 10 - 10 m 2 / N . What it means ?

Compressibility is a property of a material which measures change in volume when external force is applied on the body. Gases are generally highly compressible and liquids have low compressibility. Compressibility is equal to inverse of bulk modulus of material. K = 1 B Where, K is compressibility and B is bulk modulus of material. Compressibility of oil is given, K o i l = 20 × 10 - 10 m 2 / N Compressibility of water is, K w a t e r = 49 × 10 - 11 m 2 / N This means that given oil is more compressible than water.

Young modulus of Brass is 9 . 8 × 10 10 Nm - 2 . What it means ?

Young’s Modulus (also referred to as the Elastic Modulus or Tensile Modulus), is a measure of mechanical properties of linear elastic solids like rods, wires etc. The higher the modulus, the more stress is needed to create the same amount of strain. Brass has high value of Young's modulus.