Why do pond skaters not sink? Pond skating insects reveal water-walking secrets as they effortlessly skip across the surface leaving nothing but a tiny ripple in their wake, according to a new study. They stay afloat thanks to their small weight and the surface tension of water acting like a skin. Is water really the […]
What are two disadvantages to a coal power plant?
What are two disadvantages to a coal power plant? The major disadvantage of coal is its negative impact on the environment. Coal-burning energy plants are a major source of air pollution and greenhouse gas emissions. In addition to carbon monoxide and heavy metals like mercury, the use of coal releases sulfur dioxide, a harmful substance […]
What happened to the alpha particles when they hit the gold foil?
What happened to the alpha particles when they hit the gold foil? Alpha particles only have 2 protons, so the positive charge is not strong enough to attract the electrons in the gold atom. It might have definitely interacted, with the electrons “pulling” them toward themselves, which result in a tiny force which pushed the […]
Do vitamins give energy?
Do vitamins give energy? Vitamin B-12, or cobalamin, is a nutrient you need for good health. It’s one of eight B vitamins that help the body convert the food you eat into glucose, which gives you energy. Vitamin B-12 has a number of additional functions. What are the main source of fresh water? precipitation What […]
What does 60 feet 6 inches mean in baseball?
What does 60 feet 6 inches mean in baseball? 60 feet 6 inches is a hallowed baseball number. It might be time for a change. Francis Richter, the editor of the weekly newspaper “Sporting Life,” helped promote the idea of moving the pitcher five feet further from the batter. Before the 1893 season, the National […]
Which transition causes the absorption line at the shortest wavelength?
Which transition causes the absorption line at the shortest wavelength? Which transition causes the emission line at the shortest wavelength? From the transitions, we can see that energy involved from the transition of E to C is the largest energy involved (longest arrow) which makes it having the shortest wavelength. What is the lowest possible […]
What are sources of noise?
What are sources of noise? There are many sources of noise pollution, but here are some of the main ones: Traffic noise. Traffic noise accounts for most polluting noise in cities. Air traffic noise. Construction sites. Catering and night life. Animals. Physical. Psychological. Sleep and behavioural disorders. What are the two major sources of noise […]
How fast do Tour de France riders go uphill?
Do colleges allow test retakes?
Do colleges allow test retakes? Partial retakes are permitted by others if there are certain sections a student performs poorly on, and still others allow students to retake any exam at any time, and use the higher grade as their final score. Why is teaching to the test bad? In a research paper published in […]
What is the purpose of graphite?
What is the purpose of graphite? Graphite is used in pencils and lubricants. It is a good conductor of heat and electricity. Its high conductivity makes it useful in electronic products such as electrodes, batteries, and solar panels. What are the properties of graphite and diamond? Diamond Graphite The geometry is tetrahedral. The geometry is […]