How is coal like obsidian? Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly with minimum crystal growth. Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers called coal beds. How do […]
Why do apples turn brown in the air?
Why do apples turn brown in the air? Fruit turns brown when exposed to air because a reaction is happening when a cut piece of fruit is exposed to oxygen. The chemical reaction can be simplified to: Polyphenol Oxidase + O2 → Melanin (Brown Color) Oxygen activates the compound polyphenol oxidase in the fruit to […]
What causes high calcium levels in the blood?
What causes high calcium levels in the blood? Hypercalcemia is usually a result of overactive parathyroid glands. These four tiny glands are situated in the neck, near the thyroid gland. Other causes of hypercalcemia include cancer, certain other medical disorders, some medications, and taking too much of calcium and vitamin D supplements. Should I worry […]
Can I get into Duke with a 1350 SAT?
What was Budapest before?
What was Budapest before? The Battle of Mohács, in 1526, was followed by nearly 150 years of Ottoman rule. After the reconquest of Buda in 1686, the region entered a new age of prosperity, with Pest-Buda becoming a global city after the unification of Buda, Óbuda, and Pest on 17 November 1873, with the name […]
Where should you not put a compost bin?
Where should you not put a compost bin? 31+ Things You Should Never Put in Your Compost Heap Bread. In this category, cakes and pasta have been included. Cooking Oil. It is perceived as food by pests. Dairy Products. Fat Based Condiments and Foods. Diseased Plants. Plants That Challenge and Invade. Feces. Meat Scraps. How […]
Where are vampires mostly located?
Where are vampires mostly located? Beings having many of the attributes of European vampires appear in the folklore of Africa, Asia, North and South America, and India. Classified as vampires, all share the thirst for blood. Who is the oldest vampire? Khayman Are vampire found in India? In northern India, there is the BrahmarākŞhasa, a […]
What is the biggest construction company in South Africa?
What is the biggest construction company in South Africa? Aveng Grinaker-LTA, forms part of South Africa’s largest infrastructure company: The Avenge Group. The Group has been listed on the JSE since 1991 and has a global footprint in over 30 countries. As the builders of many iconic … How many construction companies are there in […]
What does rucksack mean?
What does rucksack mean? chiefly British. : a bag that is strapped to the back with two shoulder straps and is used for carrying personal belongings and supplies : knapsack I picked up a rucksack full of spare gear and began to slog back up the steep, slippery grass to the headland.— What is the […]
What causes flames to shoot out of the exhaust?
What causes flames to shoot out of the exhaust? This phenomenon is caused by an overly-rich air/fuel mixture, as unburnt fuel is ignited further down the exhaust system, producing a loud pop or even flames from the exhaust. The spark from the spark plug can only ignite a certain amount of air/fuel mixture, therefore the […]