Answer:
a) s
b) 3.41 mm
Explanation:
a)
We take the speed of light, c = m/s and the refractive index of glass as 1.517.
Speed = distance/time
Time = distance/speed
Refractive index, n = speed of light in vacuum / speed of light in medium
b)
We take the refractive index of water as 1.333.
Speed in water = speed in vacuum / refractive index of water
Distance = speed * time
d = 3.41 mm
Answer:
Creep
Explanation:
Creep is a type of deformation that occurs when continuous and long term mechanical stresses are being subjected to a material. Material deformation is observed even if the stresses are below the yield strength of the material, . The effect of creep is more pronounced if there is an application of heat.
In a study of turbine blades it has been shown that at the location where creep is present there was micro-structural degradation. In other places there was no micro-structural degradation.
I dont know what you are asking sorry can u elaborate
Answer:
Explanation:
Stars form inside relatively dense concentrations of interstellar gas and dust known as molecular clouds. The deep cold also causes the gas to cluster to high densities. When the density reaches a certain degree, stars form. Since the regions are dense, they become opaque to visible light and are known as dark nebula.
Gravity pulls to the centre of the earth. A ship floats in water because the water pushing it up (upthrust) is equal to the force<span> of gravity (weight) pulling it </span>down<span>. Friction also occurs when objects move through air. This is </span>called<span>air resistance.</span>