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3 years ago

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which of the following is accurate in describing the placement and classification of iodine? a. iodine is located in period 5, g

roup 17 and is classified as a nonmetal. b. iodine is located in period 17, group 5 and is classified as a nonmetal. c. iodine is located in period 6, group 7 and is classified as a metal. d. iodine is located in period 7, group 6 and is classified as a metal.

1 answer:

Elden [556K]3 years ago

8 0

A. iodine is located in period 5, group 17 and is classified as a nonmetal

Group is the column, period is the raw.

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Answer:

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Explanation:

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3 years ago

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Two cylindrical resistors are made of the same material and have the same resistance. The resistors, R1 and R2, have different r

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Answer:

Option d is correct.

Explanation:

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Writing $R_1 \ and\ R_2$ also :

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3 years ago

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3 years ago

The radius k of the equivalent hoop is called the radius of gyration of the given body. Using this formula, find the radius of g

Morgarella [4.7K]

Here is the full question:

The rotational inertia I of any given body of mass M about any given axis is equal to the rotational inertia of an equivalent hoop about that axis, if the hoop has the same mass M and a radius k given by:

$k=\sqrt{\frac{I}{M} }$

The radius k of the equivalent hoop is called the radius of gyration of the given body. Using this formula, find the radius of gyration of (a) a cylinder of radius 1.20 m, (b) a thin spherical shell of radius 1.20 m, and (c) a solid sphere of radius 1.20 m, all rotating about their central axes.

Answer:

a) 0.85 m

b) 0.98 m

c) 0.76 m

Explanation:

Given that: the radius of gyration $k=\sqrt{\frac{I}{M} }$

So, moment of rotational inertia (I) of a cylinder about it axis = $\frac{MR^2}{2}$

$k=\sqrt{\frac{\frac{MR^2}{2}}{M} }$

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k = 0.8455 m

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For the spherical shell of radius

(I) = $\frac{2}{3}MR^2$

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$k = \sqrt{\frac{2}{3} R^2}$

$k = \sqrt{\frac{2}{3} }*R$

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