Answer:
r=0.31
Ф=18.03°
Explanation:
Given that
Diameter of bar before cutting = 75 mm
Diameter of bar after cutting = 73 mm
Mean diameter of bar d= (75+73)/2=74 mm
Mean length of uncut chip = πd
Mean length of uncut chip = π x 74 =232.45 mm
So cutting ratio r
r=0.31
So the cutting ratio is 0.31.
As we know that shear angle given as
Now by putting the values
\
Ф=18.03°
So the shear angle is 18.03°.
Explanation:
Step1
Strength is the maximum stress induces in the material under applied load condition. More the strength more will be ability to sustain load. Strength can be measured from tensile test. It has same unit as stress. Generally ductile material has more strength as compare to brittle material.
Step2
Hardness is the resistance to scratch on the material under given load condition. More the hardness more will be the resistance towards scratching of material. Hardness can be measured by Rockwell or Birnell hardness test. This property of metal is opposite to the strength.
Step3
Toughness is the ability to absorb energy under given loading condition up to its fracture point. It is a type of strain energy that is stored in the metal. Generally ductile metal has more toughness as compare to brittle.
Answer:
Explanation:
Lets do this in python, our function will import an array of double numbers, then it sort the array out, drop the first and last items, aka highest and lowest score. Finally, it averages the last 3 numbers by calculate the sum and divide by the number of items
def calculate_score(scores):
scores.sort() # sort it so that the lowest is at index 0 and the highest is at last index
drop_highest_lowest = scores[1:-1] # this will drop the lowest and highest number
average_score = sum(drop_highest_lowest)/len(drop_highest_lowest)
return average_score
Answer:Discrete system are those system which change the state at the discrete point of time and continuous system are those which have state change at continuous period of time.
Explanation:
- The major difference between discrete and continuous system is that, discrete system has state change over a discontinuous time period whereas the change of state in continuous system is over a continuous time period .
- Variations can be found in the discrete system signal but in continuous system variation cannot be found input and output signal.
- Example:-
Discrete system:-employees reporting at office at different time like
9:10am, 9:15am etc
<u> Continuous system</u>:-the water flow over a dam in particular quantity
