Answer:
False, False, True, True, False, True
Explanation:
- Mixtures have components that are always in fixed ratios. FALSE. The ratio of components in a mixture is variable
- Compounds can only be separated physically. FALSE. Compounds can only be separated chemically.
- The components of a mixture keep their unique properties. TRUE.
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Mixtures can be physically separated. TRUE.
- Mixtures are pure substances. FALSE. Mixtures are formed by a mixture of 2 or more pure substances, not bonded chemically.
- Compounds are pure substances. TRUE.
If gravity where much weaker, then the houses wouldnt need as much structural support, and then could be built much more taller as they wouldnt go through as much stress. and if gravity was stronger, buildings would need to be alot more structurally sound and wouldnt be able to maintain a tall structure as the force of gravity would be too much for them. hope i helped :3
Answer:
Melting of ice is a physical change and during this change latent heat of fusion, that is, heat required to convert 1 g of a solid substance into liquid state will keep the temperature constant unless and until all the solid changes into liquid. On the other hand, a change in which a new product is formed due to change in chemical composition of the reacting species is known as a chemical change. During a chemical change, there will occur change in temperature. So, when a substance is set on fire then there will occur change in temperature of the substance. Hence, it means it is a chemical change.
Explanation:
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