Answer:
A) Cm = 2.232 s/mm²
B) Time taken to solidify = 74.3 seconds
Explanation:
(A) Since a side is 50mm and all sides of a cube are equal, thus, Volume of the cube is;V = 50 x 50 x 50 = 125,000 mm³
There are 6 faces of the cube, thus Surface Area A = 6 x (50 x 50) = 15,000 mm²
So, Volume/Area = (V/A) = 125,000/15,000 = 8.333 mm
Cm is given by the formula; Cm =[Tts] /(V/A)² where Tts is time taken to solidify and it's 155 seconds in the question. Thus;
Cm = 155/(8.333)²= 2.232 s/mm²
(B) For;Cylindrical casting with D = 30 mm and L = 50 mm.;
Volume of cylinder is;
V = (πD²L) /4
So,V = (π x 30² x 50)/4 = 35,343mm³
Surface area of cylinder is;
A = (2πD²)/4 + (πDL)
Thus, A = ((π x 30²)/2) + (π x 30 x 50) = 6126 mm²
Volume/Area is;
V/A = 35,343/6126 = 5.77 mm
Same alloy and mold type was hsed as in a above, thus, Cm is still 2.232 s/mm²
Since Cm =[Tts] /(V/A)²
Making Tts the subject, we have;
Tts =Cm x (V/A)²
Tts = 2.232 x (5.77)² = 74.3 seconds
The correct answer is April 10th.
Sir Isaac Newton is buried at Westminster Abbey in London.
<u>Queen Elizabeth I</u> is most likely to also be buried there.
<h3>Who is
Sir Isaac Newton?</h3>
Isaac Newton, or Sir Isaac Newton, was an English physicist and mathematician who was the pinnacle of the Scientific Revolution of the 17th century. Newton was born in Woolsthorpe, Lincolnshire, England, on December 25, 1642 (or January 4, 1643, New Style), and died in London on March 20 [or March 31, 1727].
His understanding of the nature of white light in optics helped to incorporate the color-related phenomena into the study of light and laid the groundwork for contemporary physical optics. The law of universal gravitation was developed in mechanics as a result of his three laws of motion, which are the cornerstones of contemporary physics.
Learn more about Sir Isaac Newton
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Answer:
The best examples of vernacular regions are the American West and the American Midwest
For better understanding, we have to explain what vernacular regions means.
The Vernacular Region is commonly referred to as the perceptual region.
It is often referred to as a place or region where individuals think exits due to their cultural identity. The vernacular regions came about due to people's informal sense of place, instead of scientific models created through geographic reasoning. it generally depicts a "sense of place"
An example of vernacular region is the the gold coast of florida, American West and the American Midwest.
From the above, we can say therefore that the answer The best examples of vernacular regions are the American West and the American Midwest is true.
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Explanation:
Answer:
4.5 hours
Explanation:
Let the time for the bicycle be t, then the time for walking is 7 - t
Distance for walking is 4*(7 - t)
Distance for cycling is 44*t
Total distance 4*(7 - t) + 44t = 208
28 - 4t + 44t = 208
40t = 208 - 28 = 180
so t = 180/40 = 4.5 hours.
