What are the negatives of mountaintop removal? Toxic heavy metals such as cadmium, selenium, and arsenic leach into local water supplies, poisoning drinking water. This destructive practice, known as mountaintop-removal mining, sends carcinogenic toxins like silica into the air, affecting communities for miles around. How does burning coal contribute to climate change it releases? The […]
What happens when a potassium atom becomes an ion?
What happens when a potassium atom becomes an ion? The ions are charged because the number of negatively charged electrons no longer cancels out the number of positively charged protons. Potassium forms ions with a positive charge. Potassium loses one electron when it reacts with chlorine. This electron is transferred to a chlorine atom to […]
What happens if you burn sugar?
What happens if you burn sugar? Sugar is made of carbon, hydrogen and oxygen atoms. When heated over a candle, these elements react with the fire to turn into a liquid. The heat causes the sugar’s atoms to combine with the oxygen in the air, forming new groups of atoms. Energy is released in this […]
Is the cat alive or dead?
Is the cat alive or dead? The Copenhagen interpretation of quantum mechanics implies that after a while, the cat is simultaneously alive and dead. Yet, when one looks in the box, one sees the cat either alive or dead, not both alive and dead. Did Schrodinger own a cat? Erwin Schrödinger doesn’t appear to have […]
How did Yaa Asantewaa died?
How did Yaa Asantewaa died? Just a year after the resurfacing of the Golden Stool, its keeper, Yaa Asantewaa, died in her sleep in 1921 while still in prison in Seychelles. But the purpose of the war had been fulfilled; Hodgson never sat on the Golden Stool and the war convinced the British to release […]
What average net force is required to accelerate a 9.5 g bullet from rest to 650 m/s over a distance of 0.85 m along the barrel of a rifle?
How much more powerful is fusion than fission?
How much more powerful is fusion than fission? Abundant energy: Fusing atoms together in a controlled way releases nearly four million times more energy than a chemical reaction such as the burning of coal, oil or gas and four times as much as nuclear fission reactions (at equal mass). Does Fusion produce more energy than […]
What is the next step after collecting data?
What is the next step after collecting data? Answer: Step 1: Identify issues and/or opportunities for collecting data. Step 2: Select issue(s) and/or opportunity(ies) and set goals. Step 3: Plan an approach and methods. Step 4: Collect data. Step 5: Analyze and interpret data. Step 6: Act on results. What common mistake do researchers make […]
How long should you hold your stretch for?
How long should you hold your stretch for? For optimal results, you should spend a total of 60 seconds on each stretching exercise. So, if you can hold a particular stretch for 15 seconds, repeating it three more times would be ideal. If you can hold the stretch for 20 seconds, two more repetitions would […]