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SashulF [63]
3 years ago
11

A museum is creating an exhibit about atoms. Which type of exhibit would best explain what atoms are? A. Put an atom on a poster

in the exhibit. B. Use a life-size drawing of an atom. C. Display a large, three-dimensional model of an atom. D. Set up a microscope so that visitors can view atoms.
Physics
2 answers:
Zolol [24]3 years ago
3 0
 
A).  No.  The entire poster is already covered with atoms,
but they're too small to see.

B).  No.  What's "life-size" of an atom ?  It's too small to see,
and that's the whole problem.

D).  No.  Atoms are too small to see even with a microscope.

C).  Yes !  A model of an atom, big enough to see, would help
get <em><u>some</u></em> of the important ideas across.


natulia [17]3 years ago
3 0

Answer:

C. Display a large, three-dimensional model of an atom.

Explanation:

took the test

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A 0.15 kg mass is suspended from a vertical spring and descends a distance of 4.6 cm, after which it hangs at rest. An additiona
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Answer:

The total extension = 19.9 cm

Work done in stretching the spring through both displacement = <em>0.633 J.</em>

Explanation:

From Hook's law,

F  = ke .................................... Equation 1.

Where F = force or weight, k = force constant of the spring, e = extension.

making k the subject of the equation,

k = F/e .......................... Equation 2

Given: F = W = mg = 0.15(9.8) = 1.47 N, e = 4.6 cm = 0.046 m.

k = 1.47/0.046

k = 31.96 N/m.

When an additional mass of 0.5 kg is suspended,

Total mass suspended(M₁) = 0.15+0.5 = 0.65 kg

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Substituting into equation 1

6.37 = 31.96e

e = 6.37/31.96

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a.

Work done in stretching the spring  through both displacement

W = 1/2ke²..................... Equation 3

Where W = work done, k = spring constant, e = extension.

Given: k = 31.96 N/m, e = 0.199 m

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W = 1/2(31.96)(0.199)²

<em>W = 0.633 J.</em>

5 0
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