Conceptual Physics: The High School Physics Program
9th Edition
ISBN: 9780133647495
Author: Paul G. Hewitt
Publisher: Prentice Hall
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Textbook Question
Chapter 18, Problem 15A
Why is the cross section of a metal beam I-shaped and not rectangular?
Expert Solution & Answer
To determine
To Explain: The cross section of metal beam is I-shaped and not rectangular.
Explanation of Solution
Introduction:
In rectangular beam, more steel material is used which increases the weight of the beam. To reduce the weight of the beam, it is I-shaped.
The beam’s material is scooped from the middle. Least material is put at middle so that beam becomes I-shaped. I-shaped beam becomes light in weight but carries the same strength as that of a rectangular beam.
Conclusion:
I-shaped beams are light in weight and carry the same strength of the rectangular beam.
Chapter 18 Solutions
Conceptual Physics: The High School Physics Program
Ch. 18 - How does the arrangement of atoms differ in a...Ch. 18 - What evidence do we have for the microscopic...Ch. 18 - Prob. 3ACh. 18 - What happens to the density of a uniform piece of...Ch. 18 - Prob. 5ACh. 18 - Which has the greater density—a heavy bar of...Ch. 18 - Prob. 7ACh. 18 - What is the difference between mass density and...Ch. 18 - a. What is the evidence for the claim that steel...Ch. 18 - What is Hookes law?
Ch. 18 - What is an elastic limit?Ch. 18 - A 2-kg mass stretches a spring 3 cm. How far does...Ch. 18 - Prob. 13ACh. 18 - Where is the neutral layer in a horizontal beam...Ch. 18 - Why is the cross section of a metal beam I-shaped...Ch. 18 - What is the weight—strength relationship in...Ch. 18 - a. If the linear dimensions of an object are...Ch. 18 - Prob. 18ACh. 18 - Which will cool a drink faster—a 10-gram ice...Ch. 18 - Prob. 20ACh. 18 - You take 1000 milligrams of a vitamin. Your friend...Ch. 18 - Your friend says that the primary difference...Ch. 18 - How does the density of a 100-kg iron block...Ch. 18 - Which has more volume—a kilogram of lead or a...Ch. 18 - Which has more weight—a liter of ice or a liter...Ch. 18 - A certain spring stretches 1 cm for each kilogram...Ch. 18 - A thick rope is stronger than a thin rope of the...Ch. 18 - Prob. 28ACh. 18 - Compression and tension stress occurs in a beam...Ch. 18 - Consider a model steel bridge that is 1/100 the...Ch. 18 - Only with great difficulty can you crush an egg...Ch. 18 - Archie designs an arch to serve as an outdoor...Ch. 18 - Why is cement not needed between the stone blocks...Ch. 18 - Prob. 34ACh. 18 - If you were trapped on a cold mountain, why would...Ch. 18 - Animals lose heat through the surface areas of...Ch. 18 - Why is heating more efficient in large apartment...Ch. 18 - Some environmentally conscious people build their...Ch. 18 - Prob. 39ACh. 18 - Which fall faster, large or small raindrops?Ch. 18 - A one-cubic-centimeter cube has sides 1 cm in...Ch. 18 - Prob. 42ACh. 18 - Prob. 43ACh. 18 - A solid 5.0-kg cylinder is 10 cm tall with a...Ch. 18 - Prob. 45ACh. 18 - What is the weight of a cubic meter of cork? Could...Ch. 18 - A certain spring stretches 3 cm when a load of 15...Ch. 18 - If a certain spring stretches 4 cm when a load of...Ch. 18 - Consider eight one-cubic-centimeter sugar cubes...Ch. 18 - Consider eight little spheres of mercury, each...
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