How to create a magnetic field and give the expression of magnetic field strength (H) and magnetic induction strength (B).

What is Ferromagnetism. The below figure is a hysteresis loop plot, giving the explanation of point b, point c, and point d. 

Explain why we see the bending of a stick in a glass of water. Explain the difference between Reflection and Refraction with the assistance of drawings.

 What is laser and explain two main features of laser. 

What is the strength of materials? Describe the strength indicators of points A and B in the below tensile stress-strain curve respectively.

Explain the reason that caused the tragedy of Titanic and list four Limitations of carbon steels compared to alloys. 

 What are the benefits of using biomaterials for structural purposes, please illustrate with a detailed sample in daily life.

A continuous and aligned glass fiber-reinforced composite consists of 40 vol% of glass fibers having a modulus of elasticity of 69 GPa, and 60 vol% of a polyester resin that, when hardened, displays a modulus of 3.4 GPa. Compute the modulus of elasticity of this composite in the longitudinal direction.
 

d B 0 hysteresis loop 8 1 H