Does freezing food make it heavier? If the meat is sealed (as it should be) when frozen, and left that way when it thaws, there will be no change of mass. Frozen meat weighs more than unfrozen meat only to the extent that during the freezing process water has condensed and frozen on its surface. […]
How is it that an electric bulb lights up?
How is it that an electric bulb lights up? When a light bulb connects to an electrical power supply, an electrical current flows from one metal contact to the other. As the current travels through the wires and the filament, the filament heats up to the point where it begins to emit photons, which are […]
Who has the most coal in the world?
Who has the most coal in the world? United States What are the disadvantages of coal? The major disadvantage of coal is its negative impact on the environment. Coal-burning energy plants are a major source of air pollution and greenhouse gas emissions. In addition to carbon monoxide and heavy metals like mercury, the use of […]
Is it safe to put antifreeze in pipes?
Is it safe to put antifreeze in pipes? Propylene Glycol is not harmful if swallowed in small amounts but it is still not recommended for use in water supply systems. Use antifreeze in waste water or hot water heating systems only if it is not practical to maintain heat in the home, insulate the vulnerable […]
What medium does light travel through the fastest?
What medium does light travel through the fastest? Light waves do not need a medium in which to travel but sound waves do. Explain that unlike sound, light waves travel fastest through a vacuum and air, and slower through other materials such as glass or water. What happens when light is slowed down? Refraction is […]
What is the length of the ladder its 6 ft from the house at the bottom and touches the wall 14 ft up at the top?
What is the similarities between elements and compounds?
What is the similarities between elements and compounds? On first glance, elements and compounds might appear different, yet they share many similarities, like being made up of atoms and having bonds linking their atoms together. Elements and compounds also share the qualities of being both pure and homogeneous substances. What are the similarities and differences […]
What are the advantage and disadvantage of asexual reproduction in plants?
What are the advantage and disadvantage of asexual reproduction in plants? The asexual reproduction is not complex, It requires less energy compared to the sexual reproduction, and there is no need for much time or energy to produce the offspring, so, the plants can produce many offspring without considering the amount of time or energy […]