Related Questions

A polymer matrix composite is reinforced with long continuous ceramic fibers aligned in one direction. The young's moduli of the matrix and fibers are Em and Er respectively and the volume fraction of the fibers is f. Assuming iso-stress condition, Young's modulus of the composite Ec in a direction perpendicular to the length of fibers, is given by the expression
A glass reinforced polymer composite comprises of 35 volume % glass fiber and 65 volume % of polymer resin. The elastic moduli of glass and polymer resin are respectively 70 GPa and 3 GPa. The elastic modulus of the composite (in GPa) under iso-strain state is
The rate of infiltration normally declines rapidly during the early part of rainstorm event and reaches a constant value after several hours of rainfall. The factors responsible for this phenomenon are
  1. I. the filling of fine soil pores with water, which reduces capillary forces
  2. II. moistened soil, clay particles to swell and reduce the size of pores
  3. III. raindrop impact breaking up with soil clumps, splashing fine particles into pores
Consider the following statements regarding the nuclear pores and choose the correct answer:
1. At the margin of each pore the outer and inner membranes are continuous
2. The pores have been described as being hexagonal
3. The pores are randomly distributed in many nuclei
One major difference between the action potential of cardiac muscle fibers and the action potential of skeletal muscle fibers is that in cardiac muscle fibers
____________is defined as the arrangement of fibers in a composite, which not only influences the properties of the composite but also it’s processing.
Consider the following statements :
1. If x and y are composite numbers, then x + y is always composite.
2. There does not exist a natural number which is neither prime nor composite.
Which of the above statements is/are correct ?
Polymer A, also available as copolymer with trifluoroethylene, is a crystalline polymer with a melting point greater than 160 ᵒC and is used in coatings and insulation materials. What is the name of polymer A?
If the volume of voids is equal to the volume of solids in a soil mass, then the values of porosity and voids ratio respectively are
Melt spinning of polymers involves the forcing of polymer melt through spinnerettes (fine holes) into an atmosphere kept at a temperature lower than the melting point of the polymer, which causes the fine diameter polymer melt to harden into filaments. Melt spinning is not used in case of the __________ fibres.