What makes a reaction dangerous? Even slow reactions can be hazardous if they involve large amounts of material or if the heat and gases are confined, such as in a sealed storage drum. Drums that are swollen and distorted from over-pressurization are potentially very dangerous. They may rupture at any time without warning and release […]
What is the main purpose of using machine?
What is the main purpose of using machine? The basic purpose for which most simple machines are designed is to reduce the effort (force) required to perform a simple task. To achieve this, the force applied must act over a longer distance or period of time resulting in the same amount of work being performed […]
What are the 3 types of serves in volleyball?
What are the 3 types of serves in volleyball? For competitive volleyball, there are three main types of overhand serves: the floater, the topspin, and the jump serve. Try them all to find out which one suits you best, but keep in mind that you will want to be somewhat proficient in all three. What […]
Can walk on Mars?
Can walk on Mars? But how will astronauts walk on Mars, where the gravity is a third of Earth’s? Volunteers walked on force-monitoring platforms while the aircraft flew up and down to recreate martian gravity. The results showed that the ideal walking speed on Mars will be only a little more than half of the […]
What are the negative effects of eutrophication?
What are the negative effects of eutrophication? Oxygen depletion, or hypoxia, is a common effect of eutrophication in water. The direct effects of hypoxia include fish kills, especially the death of fish that need high levels of dissolved oxygen. Changes in fish communities may have an impact on the whole aquatic ecosystem and may deplete […]
Are heated sapphires still valuable?
Are heated sapphires still valuable? Fine gem-quality, sapphires that have been treated by heat have also increased in value due to demand, but not as significantly. A fine quality sapphire, whether natural or heated is a good purchase. Can you heat treat sapphires at home? If your sapphire has good clarity and a color you […]
Why is water called a universal solution?
Why is water called a universal solution? Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. And, water is called the “universal solvent” because it dissolves more substances than any other liquid. This allows the water molecule to become attracted to many other different types […]
Can evaporation and condensation occur at the same time?
Can evaporation and condensation occur at the same time? Evaporation and Condensation Happen at the Same Time At any temperature, evaporation and condensation are actually occurring at the same time. Faster molecules from the liquid evaporate while slower molecules from the gas condense. What is definition of evaporation? Evaporation, the process by which an element […]
What is the change of state from a liquid to a gas called?
What is the change of state from a liquid to a gas called? vaporization What state of matter is this sample of mercury? liquid Where is liquid mercury found in nature? Mercury is a naturally-occurring chemical element found in rock in the earth’s crust, including in deposits of coal. On the periodic table, it has […]
Where does US get its electricity?
Where does US get its electricity? According to the U.S. Energy Information Administration, most of the nation’s electricity was generated by natural gas, coal, and nuclear energy in 2019. Electricity is also produced from renewable sources such as hydropower, biomass, wind, geothermal, and solar power. What percent of US power is renewable? In 2020, renewable […]