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Lerok [7]
3 years ago
15

In the modern model of the atoms over 99.9% of the atoms is made up of:

Physics
2 answers:
Charra [1.4K]3 years ago
8 0

<u>Answer: </u>The correct answer is Option D.

<u>Explanation:</u>

Modern model of atom was given by Rutherford's.

The experiment performed by him was gold foil experiment.

In his experiment, he took gold foil and bombarded it with alpha rays which were positively charged particles.

From this he observed that many of the alpha particles passed the atom, some of them deflected their path and a few of them were bounced back.

He then concluded that atom has a lot of empty space but there exist a small positive charge at the center and he named it as nucleus.

Hence, the correct answer is Option D.

QveST [7]3 years ago
3 0
In the modern model of the atoms over 99.9℅ of the atom is made up of empty space
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An unknown material has a mass
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Explanation:

The quantity of Heat Energy (Q) required to heat a material depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)

Thus, Q = MCΦ

Since,

Q = 1320 joules

Mass of material = 5.61kg

C = ? (let unknown value be Z)

Φ = 0.124°C

Then, Q = MCΦ

1320J = 5.61kg x Z x 0.124°C

1320J = 0.696kg°C x Z

Z = (1320J / 0.696kg°C)

Z = 1896.55 J/kg°C

Thus, the specific heat of the material is 1896.55J/kg°C

4 0
3 years ago
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alukav5142 [94]

Answer:

a)V=18.35 m/s (South -East)

b) t =7.41 m/s

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Explanation:

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b)

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c)

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t= 7.41 s

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EleoNora [17]
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Let
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