3 years ago

Most of the energy on Earth comes from which of the following?

1 answer:

3 0

<span>The earth gets most of its energy from the sun. The answer is letter B. This is because most of the living organisms on earth need sunlight to perform activities that would balance the ecosystem. Sunlight is the reason for the climate system on earth, the production of food through cellular respiration and many more.</span>

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2. Fracture mechanics. A structural component in the form of a wide plate is to be fabricated from a steel alloy that has a plan

ikadub [295]

Answer:

the critical flaw is subject to detection since this value of ac (16.8 mm) is greater than the 3.0 mm resolution limit.

Explanation:

This problem asks that we determine whether or not a critical flaw in a wide plate is subject to detection given the limit of the flaw detection apparatus (3.0 mm), the value of KIc (98.9 MPa m), the design stress (sy/2 in which s y = 860 MPa), and Y = 1.0.

$ac=1/\pi (\frac{Klc}{Ys} )^{2}\\ ac=1/\pi(\frac{98.9}{(1)(860/2)} )^{2}\\ ac=0.0168m\\ac=16.8mm$