Answer:
C.The chaotic arrangement of atoms or high hardness
Explanation:
We know that atomic arrangement in Solids are of two types
1)Crystalline
2)Amorphous
Crystalline arrangement have periodic arrangement where as Amorphous arrangement have random arrangement.
Generally all metal have Crystalline arrangement and material like wood ,glass have random arrangement ,that is why wood and glass is called Amorphous.We know that wood act as a insulator for conductivity and glass is a brittle and hard material.
So from above we can say that Amorphous material have chaotic arrangement of atoms or have high harness,so our option c is right.
Answer:
N = 278.5 rpm
F = 348.15 mm/min
machine time = 10.34 seconds
material removal rate = 33420000 mm³/min
Explanation:
given data
length L = 400 mm
width W = 60 mm
diameter D = 80 mm
no of cutting n = 5
velocity V = 70 m/min = 70000 mm/min
chip load P = 0.25 mm/tooth
depth = 5 mm
solution
we know velocity that is express as
velocity V = D N ........1
N =
N = 278.5 rpm
and
now we get feed rate in milling operation is
F n P N
F = 5 × 0.25 × 278.5
F = 348.15 mm/min
and
now we get actual machine time to make 1 pass across surface of worl is
machine time =
machine time =
machine time = 0.1723 min = 10.34 seconds
and
max material removal rate during these cut is
material removal rate = A × d × N
material removal rate = 400 × 60 × 5 × 278.5
material removal rate = 33420000 mm³/min
Studying engineering can help you get a good job, especially if your studying it in college. It can also help you in real life. For example, if something is wrong with your vehicle you could possibly fix it with little to no help.