structural properties of matter

what is the dimension of Young's modulus?

• [Y]=ML^-2T^-1

• [Y]=ML^-1T^-1

• [Y]=ML^-1T^-2

• [Y]=M^-1L^-1T^-1

what is the dimension of Young's modulus?

• [Y]=ML^-2T^-1

• [Y]=ML^-1T^-1

• [Y]=ML^-1T^-2

• [Y]=M^-1L^-1T^-1

what is the stress on a wire of cross section 0.01 cm² subjected with a force of 2x10⁴ N?

• 2x10⁶ Nm^-2

• 2x10⁸ Nm^-2

• 2x10¹⁰ Nm^-2

• 2x10¹² Nm^-2

which of these is true in case of poison's ratio

• 1< $\sigma$ <0.5

• -1< $\sigma$ <0.5

• -1< $\sigma$ <1

• -1< $\sigma$ <-0.5

why does a drop of water assume a spherical shape?

• due to elasticity

• due to viscosity

• because of gravity

• because of surface tension

the weakest bon of the chemical bond is

• ionic bond

• covalent bond

• vander waals bond

• metallic bond

COHESIVE FORCE IS

• mutual attractive force between molecules of different materials

• mutual attractive force between molecules of same materials

the length of a wire is 3m, its area of cross section is 2 mm² and breaking stress is 2.45x10⁸ Nm^-2. the breaking weight of the wire is

• 3.6x10³N

• 4,9x10⁵N

• 4.9x10^-2N

• 4.9x10²N

within elastic limit, the ratio of shearing stress and shearing strain is-

• young's modulus

• bulk modulus

• rigidity modulus

• poisson's ratio

the angle of contact of a liquid that wets the glass is-

• about 90 degree

• about 0 degree

• greater than 90 degree

• less than 90 degree