Answer:
True
Explanation:
A fatigue failure mode its produced according to three specifyc steps:
- The beginning of the <u>microcracks</u> in some especyfic point of the element
- The <u>microcracks</u> evolve into <u>macrocracks</u> and develop parelels surfaces separted by longitudinal ridges. This surfaces could have dark an light marks known as <u>beach marks</u>. This beach marks depend of the fluctuation of the loads and the corrsive nature of the environment.
- The element cant bear the loads anymore and the fracture occurs suddenly.
Answer:
A rivet is a mechanical fastener composed of a head on one end and a cylindrical stem on another (called the tail) which has the appearance of a metal pin.
When installed the rivet is either drilled, placed or punched into a hole, afterwards the tail is then deformed, holding the rivet in place. When finished the tail has the appearance of a dumbbell shape completing the riveted joint.
Answer:
Tesla switched to smaller front motors to permanent magnets on the model S and X after seeing the mileage results of model 3 permanent magnet motors.
The model 3 got more mileage but they make their money by keeping people coming back for a new car after their mileage runs out.
So they switched to a less quality standard model.
Answer:
The correct answer is part 'c': 6.4 W/m-K
Explanation:
We know that the thermal resistance of a wall is given by
where,
L = thickness of wall
k = thermal conductivity of wall
A = Surface area of wall
Applying values we get
