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The number $70.300722$ is **rational** because it can be expressed as the fraction $\frac{70300722}{1000000}$.

· Mathematics · Rational Number Properties · Irrational Number Properties

Author Emily Rosen15 Aug, 2024

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No, **there is no material with perfect resistance to electricity**; even the best insulators allow a negligible amount of current, as described by $V = IR$.

· Physics · Electrical Resistance · Superinsulators

Author Richard Hamilton15 Aug, 2024

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Given that an angle measures $36^\circ$ and since it’s **less than $90^\circ$**, it is classified as an **acute angle**.

· Mathematics · Measure Of Angles · Definition Of Acute Angles

Author Emily Rosen15 Aug, 2024

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The acid test helps determine if a mineral is a **carbonate**, as carbonate minerals react with hydrochloric acid (HCl) to produce carbon dioxide gas (CO₂) and effervescence.

· Chemistry · Carbonate Minerals · Hydrochloric Acid Reaction

Author Johnathan Clark 15 Aug, 2024

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Chocolate candy melts in your hand because **the heat from your body** (approximately 37°C or 98.6°F) **is higher than the melting point of chocolate** (30°C to 32°C or 86°F to 90°F), causing the cocoa butter to transition from solid to liquid.

· Chemistry · Melting Point Of Chocolate · Heat Transfer

Author Johnathan Clark 15 Aug, 2024

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Substances with London dispersion forces are the least soluble because the **weak intermolecular attractions** do not substantially overcome the cohesive forces within the solute and solvent, leading to poor dissolution, especially in polar solvents.

· Chemistry · Intermolecular Forces · Solubility Principles

Author Johnathan Clark 15 Aug, 2024

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The reaction between iron pipes and fertilizer produces **corrosive iron compounds**, mainly iron oxides, through oxidation, resulting in the formation of rust ($\text{Fe}_2\text{O}_3 \cdot n\text{H}_2\text{O}$).

· Chemistry · Oxidation Reactions · Formation Of Iron Oxides

Author Johnathan Clark 15 Aug, 2024

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Shells and corals belong to the **Biosphere**, interacting significantly with both the **Lithosphere** and **Hydrosphere** through processes like the formation of calcium carbonate ($\text{CaCO}_3$).

· Biology · Biosphere · Lithosphere And Hydrosphere Interactions

Author Rebecca Green 15 Aug, 2024

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