What are the different kinds of polymer? The eight most common types of synthetic organic polymers, which are commonly found in households are: Low-density polyethylene (LDPE) High-density polyethylene (HDPE) Polypropylene (PP) Polyvinyl chloride (PVC) Polystyrene (PS) Nylon, nylon 6, nylon 6,6. Teflon (Polytetrafluoroethylene) Thermoplastic polyurethanes (TPU) What is polymer and its uses? Product made from […]
Does dreaming mean good sleep?
Does dreaming mean good sleep? Dreaming is a normal part of healthy sleep. Good sleep has been connected to better cognitive function and emotional health, and studies have also linked dreams to effective thinking, memory, and emotional processing. Is 4 hours deep sleep good? Scientists agree that sleep is essential to health, and while stages […]
What family is potato?
What family is potato? Nightshade Where are potatoes originally from? Peru Which country is famous for potatoes? China is now the biggest potato producer, and almost a third of all potatoes is harvested in China and India….Top potato producers, 2007. Quantity (tonnes) 1. China 72 040 000 2. Russian Fed. 36 784 200 3. India […]
What if you find oil on your land?
What does 1.0g mL mean?
What gives a rainbow its shape?
What gives a rainbow its shape? In raindrops, sunlight bounces back, or reflects, most strongly at a certain angle – 42 degrees. As long as the angle is right, then the light will be reflected and you see a rainbow. So the reflection gives you the shape of the rainbow, while the refraction gives you […]
What reflects the most solar radiation?
What reflects the most solar radiation? The surface of the Earth absorbs 51 percent of the insolation. Water vapor and dust account for 16 percent of the energy absorbed. The other 3 percent is absorbed by clouds. Of the 30 percent that is reflected back into space, 6 percent is reflected by air and dust. […]
What is difference between igneous and sedimentary rocks?
What is difference between igneous and sedimentary rocks? There are three kinds of rock: igneous, sedimentary, and metamorphic. Igneous rocks form when molten rock (magma or lava) cools and solidifies. Sedimentary rocks originate when particles settle out of water or air, or by precipitation of minerals from water. They accumulate in layers. What are the […]
Which cell has highest efficiency?
Which cell has highest efficiency? Scientists have developed a solar cell that is capable of converting direct sunlight into electricity with 44.5 percent efficiency — making it, potentially, the most efficient solar cell in the world. Current solar technology only converts electricity with a maximum efficiency of about 25 percent. Which metal is used to […]