Is filtered water a pure or impure substance? Water is a pure substance because it only contains one type of molecule. Pure water contains only molecules that are a combination of one oxygen atom… Is oxygen pure or impure? Air is a mixture of gasses, including nitrogen, oxygen, carbon dioxide and water vapour, as such […]
What is the difference between actual and theoretical yield?
What is the difference between actual and theoretical yield? Remember, the theoretical yield is the amount of product produced when the entire limiting product is used up, but then actual yield is the amount of product that is actually produced in a chemical reaction. Why is my actual yield higher than theoretical yield? The percent […]
What are the disadvantages of Daylight Savings Time?
What are the disadvantages of Daylight Savings Time? 1. Changing the time, even if it is only by an hour, disrupts our body clocks and rhythm. According to officials, the lack of sleep at the start of DST has lead to car accidents, workplace injuries, suicide and miscarriages. The risk of suffering a heart attack […]
How do plants return water back into the environment?
How do plants return water back into the environment? Plants soak up large amounts of water through their roots. The water then moves up the plant and evaporates from the leaves in a process called transpiration. The process of transpiration, like evaporation, returns water back into the atmosphere. What’s it called when plants lose water […]
Why do cheaters get angry when caught?
Why do cheaters get angry when caught? Getting caught cheating is a shameful act. Cheaters become furious when caught because of the number of people they’ve hurt in the process. Cheaters become furious when caught because of the number of people they’ve hurt in the process. Is it OK to forgive someone who hurt you? […]
What type of microscope do doctors use?
What type of microscope do doctors use? Electron microscopes use concentrated beams of electrons and dyes to illuminate their specimens. These electron beams have very short wavelengths, which means they are able to produce exceptionally high-resolution images. Clinics can utilize these scopes to identify and examine viruses within the bloodstream. How can a microscope be […]
What has disrupted the carbon cycle in the last 150 years?
What has disrupted the carbon cycle in the last 150 years? Since the industrial revolution in the 19th century, carbon dioxide in the atmosphere has risen by 30%. Scientists have shown that this increase in carbon dioxide is a result of human activities that have occurred over the last 150 years, including the burning of […]
What property of exoplanets will affect the amount of wobble that is detected?
What property of exoplanets will affect the amount of wobble that is detected? We all know that the chains of gravity shackle a planet to its star. That star’s enormous gravitational influence keeps its planetary family in orbit. But gravity works both ways: as the planets sweep around in their orbits, they tug on their […]
What are the examples of prefixes?
What are the examples of prefixes? A prefix is a group of letters placed before the root of a word. For example, the word “unhappy” consists of the prefix “un-” [which means “not”] combined with the root (or stem) word “happy”; the word “unhappy” means “not happy.” What are common prefixes? 12 Common Prefixes and […]
Is isolated ground necessary?
Is isolated ground necessary? An isolated ground, if installed correctly, can reduce some electrical noise. However, complete power conditioning and protection usually requires additional devices such as a surge protector or an uninterruptible power supply. If the receptacle is not installed correctly, it can create a dangerous installation. What is the difference between a grounded […]