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Leona [35]
3 years ago
15

Which two of the following are the least dense materials shown?

Physics
2 answers:
sergiy2304 [10]3 years ago
7 0
I did this test, i think its loaf of bread and pillow

uysha [10]3 years ago
3 0
Pillow. When you make the mass of off substances equivalent, the pillow takes up the most volume. This means it is the least dense. 
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Answer:

a) 145.6kgm^2

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Explanation:

Complete qestion: a) the rotational inertia of the merry-go-round about its axis of rotation 

(b) the magnitude of the angular momentum of the child, while running, about the axis of rotation of the merry-go-round and

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a) From I = MK^2

I = (160Kg)(0.91m)^2

I = 145.6kgm^2

b) The magnitude of the angular momentum is given by:

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L = 158.4kg-m^2/s

c) The total moment of inertia comprises of the merry- go - round and the child. the angular speed is given by:

L = Iw

158.4kgm^2/s = [145kgm^2 + ( 44.0kg)(1.20)^2]

w = 158.6/208.96

w = 0.76rad/s

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3 years ago
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Explanation:

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