bar as she swings through the air. After he stops pushing her, she slows down
and eventually stops. This example shows that:
A. energy is converted between forms with complete efficiency.
B. energy is created as Sally's dad begins to push her.
C. energy is destroyed by friction and vibration.
D. energy is transferred to friction and vibration as it is converted between different forms.
According to law of conservation of energy, the given example shows that energy is transferred to friction and vibration as it is converted between different forms as it can neither be created nor destroyed.
According to law of conservation of energy, it is evident that energy is neither created nor destroyed rather it is restored at the end of a process .
Law of conservation of mass and energy are related as mass and energy are directly proportional which is indicated by the equation E=mc².Concept of conservation of mass is widely used in field of chemistry, fluid dynamics.
Law needs to be modified in accordance with laws of quantum mechanics under the principle of mass and energy equivalence.This law was proposed by Julius Robert Mayer in the year 1842.
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Answer:d
Explanation:
Answer:
Net ionic equation:
Ca⁺²(aq) + CO²⁻₃(aq) → CaCO₃(s)
Explanation:
Chemical equation:
K₂CO₃ + CaCl₂ → KCl + CaCO₃
Balance chemical equation:
K₂CO₃(aq) + CaCl₂(aq) → 2KCl(aq) + CaCO₃(s)
Ionic equation:
2K⁺(aq) + CO²⁻₃(aq) + Ca⁺²(aq) + 2Cl⁻(aq) → 2K⁺(aq) + 2Cl⁻(aq) + CaCO₃(s)
Net ionic equation:
CO²⁻₃(aq) + Ca⁺²(aq) → CaCO₃(s)
The K⁺(aq) and Cl⁻ (aq) are spectator ions that's why these are not written in net ionic equation. The CaCO₃ can not be splitted into ions because it is present in solid form.
Spectator ions:
These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.
The net ionic equation for the reaction between K2CO3 and CaCl2 is Ca2+(aq) + CO3^2-(aq) --> CaCO3(s). This is obtained after removing the spectator ions (K+ and Cl-) from the full ionic equation.
The subject of discussion is the net ionic equation for the given chemical reaction between K2CO3(aq) and CaCl2(aq). An ionic equation represents the ions that are present in a chemical reaction, and a net ionic equation only shows the ions that actually participate in the reaction.
To form the net ionic equation, we first write the complete ionic equation. In this case, K2CO3(aq) breaks down into 2 K+(aq) + CO3^2-(aq), and CaCl2(aq) breaks down into Ca2+(aq) + 2 Cl-(aq). The products would be 2 K+(aq) + 2 Cl-(aq) + CaCO3(s).
The net ionic equation is then formed by canceling out the spectator ions (ions that do not participate in the reaction). Here, the spectator ions are K+ and Cl-. So, the net ionic equation is: Ca2+(aq) + CO3^2-(aq) --> CaCO3(s)
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Phoenicia had a powerful, well-trained army.
B.
Phoenicia was known for its science and culture.
C.
Phoenicia led an alliance of many city-states.
D.
Phoenicia was a major sea trading power
The Phoenicians be described as successors to the Minoans as Phoenicia was a major sea trading power. Hence option D is correct.
Phoenicians are defined as an ancient thalassocratic culture with its center in present-day Lebanon, which originated in the Levant region of the eastern Mediterranean. Throughout their history, the Phoenician city-states' borders expanded and contracted, and they controlled various enclaves, including Arwad and Tell Sukas. The Phoenician and Punic religion was a polytheistic system with regional variations and some shared characteristics.
The Phoenicians and the Minoans were both well-known marine traders who concurrently ruled the seas without any signs of warfare.Both cultures blended the functions of their commerce hub, royal palace, and administrative hub.
Thus, the Phoenicians be described as successors to the Minoans as Phoenicia was a major sea trading power. Hence option D is correct.
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Answer: Phoenicia was a major sea trading power
Explanation:
A magnet keeps a cabinet door closed.
The Sun pulls on Earth as Earth moves around the Sun.
The protons in the nucleus of a carbon atom are held together.
An example of the strong force in action is the protons in the nucleus of a carbon atom which are held together.
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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Answer:
It would be D) The protons in the nucleus of a carbon atom are held together.
Explanation:
Strong forces only work in the nuclei