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lyudmila [28]
3 years ago
8

According to the scientific observation that energy is conserved in a "closed system,” no machine can do work on its surrounding

environment forever. This observation has been made over and over again in all sciences, and no example has been found that disproves the fact of conservation of energy.
The fact that energy is always conserved in a closed system is what type of scientific statement?
a law
a theory
an inquiry
a hypothesis
Physics
2 answers:
tensa zangetsu [6.8K]3 years ago
7 0
I believe it is theory
konstantin123 [22]3 years ago
5 0

The Law is the correct answer

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Elaborate on the reason(s) that matter is said to move even as in a solid state.
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<u>Answer:</u>

The matter does not move in solid state but vibrates.

<u>Explanation:</u>

The atoms inside the matter cannot move or shift their positions without any external force but makes some small vibration movements. Generally in solids, the particles are bound by the attractive forces acting in between the atoms inside the matter.

The small vibrations that are happening inside the matter are because of the external factors like temperature. The increase in temperature raises the kinetic energy of the atoms inside and makes them move faster and this results in the vibration of the matter.

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Which two statements are true of electromagnetic waves?
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B and C

Explanation:

Because EMWs are varying magnetic and electric radiation traveling at 90° to each other propagating energy form one place to another through vibration of these magnetic and electric fields

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Describe the relationship between the Law of Conservation of Matter and balancing equations.
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Answer:

The mass of the products and reactants are the same on both sides of the equation.

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The part of the Electromagnetic (Light) Spectrum used to see through the dust
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A or C

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If the distance between the Earth and Moon were half what it is now, by what factor would the force of gravity between them be c
hichkok12 [17]

Answer:

4

Explanation:

G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²

m_1 = Mass of Earth

m_2 = Mass of Moon

r = Distance between Earth and Moon

Old gravitational force

F_o=\dfrac{Gm_1m_2}{r^2}

New gravitational force

F_n=\dfrac{Gm_1m_2}{(\dfrac{1}{2}r)^2}

Dividing the equations

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The ratio is \dfrac{F_n}{F_o}=4

The new force would be 4 times the old force

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