Category: Physics

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 […]

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 […]

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 […]

How do you tell if two vectors are perpendicular? Two vectors A and B are parallel if and only if they are scalar multiples of one another. A = k B , k is a constant not equal to zero. Two vectors A and B are perpendicular if and only if their scalar product is […]

What does 1.0g mL mean? The density of each substance is given in units of mass per unit volume, for our cubes this will be mass in grams per cubic centimeter, that is, g/cm-3 or g cm-3. If you weigh 1.00 mL of liquid water it will have a mass of about 1 g so […]

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 […]

Can a small capacitor kill? Obviously the larger the capacitor, the higher the voltage, the greater the risk of a lethal shock becomes. A really small capacitor charged to a high voltage will not kill you, for example a 100pF capacitor charged to 10kV will only give you a mild static shock. Is a 1000uF […]