Category: Physics

What is the meaning of normal distribution in statistics? A normal distribution is the proper term for a probability bell curve. In a normal distribution the mean is zero and the standard deviation is 1. It has zero skew and a kurtosis of 3. Normal distributions are symmetrical, but not all symmetrical distributions are normal. […]

How many germs are in a sneeze? Their research found that the average sneeze or cough can send around 100,000 contagious germs into the air at speeds up to 100 miles per hour. Those germs carry viruses, such influenza, respiratory syncytial virus (RSV), and adenoviruses, which cause the common cold. How fast does a sneeze […]

What is a Class 5 filling? Class V: Cavity on the cervical third of the facial or lingual surfaces of any tooth (Think of the neck of the tooth) Class VI: Cavity on incisal edges of anterior teeth and cusp tips of posterior teeth (Class VI corresponds to the very top surface of a tooth) […]

What are the advantages of the heliocentric model? 5. One of the advantages of the heliocentric theory which could have been understood and known by Copernicus’ contemporaries was its ability to explain the variations in brightness of planets (such as Mars), and the phases of the inner planets (Mercury and especially Venus). Why was Martin […]

How much does dry ice cost at Walmart? Dry ice at Walmart usually costs between $1.00-$1.50/lb and rarely costs more than that. Online Walmart have it listed as $1.44/lb but this can vary from store to store with some stores selling it for as little as $1.00/lb. How much does 50 lbs of dry ice […]

Is Krakatoa on a hotspot? Today, Anak Krakatoa—the “child of Krakatoa”—stands more than 1,300 feet high and is growing an average of 16 feet per year. It’s a little mountain still, but plainly one of the most dramatic. A volcanic island that vanished in a powerful eruption in 1883, Krakatoa has been reborn. What does […]

What are the benefits of magnesium chloride? This medication is a mineral supplement used to prevent and treat low amounts of magnesium in the blood. Some brands are also used to treat symptoms of too much stomach acid such as stomach upset, heartburn, and acid indigestion. What are the side effects of magnesium chloride? Common […]

Is Salt a pollution? According to Brooke Asleson, MPCA project manager for the Twin Cities Metro Area chloride project, Salt is a real threat to water quality. It only takes one teaspoon of road salt to permanently pollute five gallons of water. Does pollution affect salt water? Fertilizer and stormwater runoffs and urban wastewater discharge […]

What kind of metal can go in a microwave? If you must put metal in your microwave—your house, your rules—the safest option is flat, non-crinkled aluminum foil. With few sharp corners, the electrons have a large area to vibrate over and not many places to get stuck. Can you break a microwave by running it […]

What happens when dead person comes in dream? Dreams of someone dying can be unsettling, but they shouldn’t be taken literally. Death in a dream may symbolize the end of something and the beginning of something new. Dreams provoke emotions — and those emotions can help you connect a dream to events in your life. […]