What is crystallization for Class 7th? Crystallization is a process by which a pure soluble substance separates out in the form of crystals from its hot and saturated solution on cooling. The process is employed in the separation of pure common salt from the impure common salt obtained from sea. What is the principle of […]
Is 60 gigahertz harmful to humans?
Is 60 gigahertz harmful to humans? In addition to the very low power levels discussed above, 60 GHz systems do not penetrate the human body. As a result, exposure to 60 GHz is very similar to the exposure to sunlight ” but at 1/10,000 of the energy. Lower-frequency emissions penetrate and may even pass completely […]
Does the melting point increase across a period?
Does the melting point increase across a period? Melting and boiling points increase across the three metals because of the increasing strength of their metallic bonds. The number of electrons which each atom can contribute to the delocalized “sea of electrons” increases. The atoms also get smaller and have more protons as you go from […]
Which jet stream is responsible for burst of monsoon?
Which jet stream is responsible for burst of monsoon? Easterly Jet Stream How jet streams are formed? Jet streams are currents of air high above the Earth. They move eastward at altitudes of about 8 to 15 kilometers (5 to 9 miles). They form where large temperature differences exist in the atmosphere. Cooler, heavier air […]
Is Iron bad for copper pipes?
Is Iron bad for copper pipes? On cold-water piping, pitting and corrosion is often caused by an excess amount of flux residue. Iron deposits from a rusty water heater can also corrode copper pipes. What pH level is toxic? Toxic effects on survival, motility, and growth decreased with increasing pH. From pH 6.9 to 9.0, […]
What is the coldest item in the world?
What is the coldest item in the world? The protoplanetary Boomerang Nebula, located 5,000 light-years from Earth, holds the record for coldest known object in the Universe. Outflows of gas, streaming out from the central dying star, reach temperatures below -270 degrees Celsius. How long does volcanic ash stay in the air? three years Why […]
What greenhouse gas has over 100x the efficiency of carbon dioxide to reflect light back to the earth?
What greenhouse gas has over 100x the efficiency of carbon dioxide to reflect light back to the earth? A methane molecule has 25 times the global warming potential of a CO2 molecule. A single nitrous oxide molecule has 298 times the global warming potential of a CO2 molecule. Which of the following contribute the most […]
How mass of the ball affects the motion of the ball?
How mass of the ball affects the motion of the ball? Both encounter the same air resistance, but, the heavier ball has a greater downward force which overcomes the upward force of the air. The heavier ball will still reach a t erminal velocity. But, it will accelerate longer than the hollow ball, and its […]
What is the output of an OR gate if the inputs are 1 and 0?
How much gold is in a cell phone?
How much gold is in a cell phone? There are 0.034 grams of gold in each cell phone, according to the U.S. Geological Survey. That’s the equivalent of 0.001 troy ounces, worth about $1.82 at today’s prices. There are also 16 grams of copper, worth about 12 cents, 0.35 grams of silver, worth 36 cents, […]