Can a chemical change be reversed? A chemical change occurs whenever matter changes into an entirely different substance with different chemical properties. Because chemical changes result in different substances, they often cannot be undone. What is a chemical change that Cannot be reversed? Burning is a non-reversible chemical change. When you burn wood, the carbon […]
What is the deadliest disease in human history?
What is the deadliest disease in human history? Major epidemics and pandemics by death toll Rank Epidemics/pandemics Disease 1 Black Death Bubonic plague 2 Spanish flu Influenza A/H1N1 3 Plague of Justinian Bubonic plague 4 HIV/AIDS pandemic HIV/AIDS How do I unsubscribe from curable? How do I cancel My Curable Subscription? Canceling is easy. Simply […]
Is oxygen atom stable or unstable?
Is oxygen atom stable or unstable? One oxygen atom is unstable since it has only 6 electrons in the outermost shell. For an atom to be stable it needs 8 electrons. So, for the oxygen atom to be stable it requires two more electrons in the valence shell. Which is the least stable Carbocation? methyl […]
What is an electromagnet give its characteristics?
What is an electromagnet give its characteristics? An electromagnet is a magnet that runs on electricity. Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it. The poles of an electromagnet can even be reversed by reversing the flow of electricity. […]
Do humans have gill slits?
Do humans have gill slits? …and other nonaquatic vertebrates exhibit gill slits even though they never breathe through gills. These slits are found in the embryos of all vertebrates because they share as common ancestors the fish in which these structures first evolved. Human embryos also exhibit by the fourth week of development a well-defined… […]
Which type of telescope is best?
Which type of telescope is best? As a rule of thumb, your telescope should have at least 2.8 inches (70 mm) aperture — and preferably more. Dobsonian telescopes, which are reflectors with a simple mount, provide lots of aperture at relatively low cost. A larger aperture lets you see fainter objects and finer detail than […]
Is heliocentric model correct?
Is heliocentric model correct? The geocentric model states that the Sun and the planets move around the Earth instead of the heliocentric model with the Sun in the center. Obviously the Earth orbits the Sun. Sure, the textbooks all say that the solar system is heliocentric. What is difference between geocentric and heliocentric? The geocentric […]
How do I make an organizational chart in PowerPoint?
How do I make an organizational chart in PowerPoint? Head to the “Insert” tab and then click “SmartArt.” In the Choose a SmartArt Graphic window that opens choose the “Hierarchy” category on the left. On the right, click an organization chart layout, such as “Organization Chart.” When you’re done, click “OK.” What is the best […]
Who gave the first evidence of Big Bang Theory?
Who gave the first evidence of Big Bang Theory? Georges Lemaître Where did Big Bang come from? Etymology. English astronomer Fred Hoyle is credited with coining the term “Big Bang” during a talk for a March 1949 BBC Radio broadcast, saying: “These theories were based on the hypothesis that all the matter in the universe […]
What are the 16 branches of science?
What are the 16 branches of science? Physical science Physics. Chemistry. Earth science. Space Science or Astronomy. Biochemistry. Microbiology. Botany. Zoology. What are the best science subjects? Let’s check the list of top 10 popular sciences among students. Mathematics: the Most Popular Discipline among Students. Biology: Students Find Knowledge about Life Popular. Chemistry: a Popular […]