Category: Physics

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 […]

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 […]

Does plasma have an indefinite shape? Plasma is a state of matter that is often thought of as a subset of gases, but the two states behave very differently. Like gases, plasmas have no fixed shape or volume, and are less dense than solids or liquids. Which state of matter has a high density and […]

What if you find oil on your land? If you find oil in your back yard, is it yours? If you own land, you have property rights. To own oil or any other mineral coming from your land, you must have mineral rights in addition to your property rights. In other countries, the government has […]

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 are 2 examples of fungi? Examples of fungi are yeasts, rusts, stinkhorns, puffballs, truffles, molds, mildews and mushrooms. What are 3 example of fungi? Fungus, plural fungi, any of about 144,000 known species of organisms of the kingdom Fungi, which includes the yeasts, rusts, smuts, mildews, molds, and mushrooms. There are also many funguslike […]

What object has the greatest force of gravity? On the planet Jupiter, where gravity is stronger, you would weigh much more than you do here. On the sun, gravity is so strong that you would weigh about 27 times as much as on earth! What is the most cheapest thing in the universe? The answer […]

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 […]

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 […]

How can you tell if a precipitate has formed in solution? The identity of the precipitate can often be determined by examining solubility rules. It also occurs in single displacement when one metal ion in solution is replaced by another metal ion. Notice the new solid forming on the bottom of the tube. Which solution […]