Answer:
Change in length = 0.1257 mm
Change in diameter= -0.03771mm
Explanation:
Given
Diameter, d = 15 mm
Length of rod, L = 200mm
F = Force= 300N
d = 0.015m
Ep=2.70 GPa, np=0.4.
First, we have to calculate the normal stress using
σ = F/A where F = Force acting on the Cross-sectional area
A = Area
Area is calculated as πd²/4 where d = 0.015m
A = 22/7 * 0.015²/4
A = 0.000176785714285m²
A = 1.768E-4m²
So, stress. σ = 300N/1.768E-4m²
σ = 1696832.579185520Pa
σ = 1.697MPa
Calculating E(long)
E(long) = σ /Ep
E(long) = 1.697E-3/2.70
E(long) = 0.0006285
At this point, we fan now calculate the change in length of the element;
∆L = E(long) * L
∆L = 0.0006285 * 200mm
∆L = 0.1257mm
Calculating E(lat)
E(lat) = -np * E(long)
E(lat) = -4 * 0.0006285
E(lat) = -0.002514
At this point, we can now calculate the change in diameter of the element;
∆D = E(lat) * D
∆L = -0.002514 * 15mm
∆L = -0.03771mm
Answer:
# Python Program to Print
# all subsets of given size of a set
import itertools
def findsubsets(s, n):
return list(itertools.combinations(s, n))
# Driver Code
s = {1, 2, 3}
n = 2
print(findsubsets(s, n))
-----------------------------------------------
# Python Program to Print
# all subsets of given size of a set
import itertools
# def findsubsets(s, n):
def findsubsets(s, n):
return [set(i) for i in itertools.combinations(s, n)]
# Driver Code
s = {1, 2, 3, 4}
n = 3
print(findsubsets(s, n))
-------------------------------------------------------------
# Python Program to Print
# all subsets of given size of a set
import itertools
from itertools import combinations, chain
def findsubsets(s, n):
return list(map(set, itertools.combinations(s, n)))
# Driver Code
s = {1, 2, 3}
n = 2
print(findsubsets(s, n))
Explanation:
voltage, current and resistance are the Volt [ V ], Ampere [ A ] and Ohm [ Ω ]
