In the book, Uncle Ned gets stuck in the air because he is wearing the title pants, whích are filled with helium, and the title character (the young scientist Ada Twist) has to help him get down (if you want to know how, you'll have to read the book). Let's explore whether this perilous invention is feasible. As you know from physics, Uncle Ned will float (in air) if the buoyant force pushing him upward is greater than his weight pulling him downward. Let's assume that Uncle Ned has a mass of 80 kg, and (since, as we said in problem I, humans are mostly made of water) he has the same density as water. a) What is Uncle Ned's weight? (Without the helium, but we can assume the helium won't add much additional weight.) b) What is the buoyant force on Uncle Ned when he is not wearing the helium pants? c) How much minimum volume of helium needs to be in Uncle Ned's pants for him to float? d) If you model Uncle Ned (and his holium

In the book, Uncle Ned gets stuck in the air because he is wearing the title pants, whích are filled with helium, and the title character (the young scientist Ada Twist) has to help him get down (if you want to know how, you'll have to read the book). Let's explore whether this perilous invention is feasible. As you know from physics, Uncle Ned will float (in air) if the buoyant force pushing him upward is greater than his weight pulling him downward. Let's assume that Uncle Ned has a mass of 80 kg, and (since, as we said in problem I, humans are mostly made of water) he has the same density as water. a) What is Uncle Ned's weight? (Without the helium, but we can assume the helium won't add much additional weight.) b) What is the buoyant force on Uncle Ned when he is not wearing the helium pants? c) How much minimum volume of helium needs to be in Uncle Ned's pants for him to float? d) If you model Uncle Ned (and his holium

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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In the book, Uncle Ned gets stuck in the air because he is wearing the title pants, which are filled with
helium, and the title character (the young scientist Ada Twist) has to help him get down (if you want to
know how, you'Il have to read the book). Let's explore whether this perilous invention is feasible.
和
As you know from physics, Uncle Ned will float (in air) if the buoyant force pushing him upward is
greater than his weight pulling him downward. Let's assume that Uncle Ned has a mass of 80 kg, and
(since, as we said in problem I, humans are mostly made of water) he has the same density as water.
a) What is Uncle Ned's weight? (Without the helium, but we can assume the helium won't add
much additional weight.)
b) What is the buoyant force on Uncle Ned when he is not wearing the helium pants?
c) How much minimum volume of helium needs to be in Uncle Ned's pants for him to float?
d) If you model Uncle Ned (and his helium pants) as a cube, what would be the minimum length
of the side of the cube for him to float?

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