How do we map the sea floor today? Echo sounding is the key method scientists use to map the seafloor today. The technique, first used by German scientists in the early 20th century, uses sound waves bounced off the ocean bottom. Echo sounders aboard ships have components called transducers that both transmit and receive sound […]
What shade of clay is the purest form?
What is the photon frequency needed to eject electrons?
What is the photon frequency needed to eject electrons? The minimum energy required to eject an electron from the surface is called the photoelectric work function. The threshold for this element corresponds to a wavelength of 683 nm. Using this wavelength in the Planck relationship gives a photon energy of 1.82 eV. What is the […]
What is the difference between two isotopes of an element?
What is the difference between two isotopes of an element? Isotopes. An isotope is one of two or more forms of the same chemical element. Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number, but a different number of neutrons giving each elemental isotope […]
Where does mine waste go?
Where does mine waste go? All mines generate waste, one type of which is known as “tailings”. Often these solid wastes are stored at or near the mine site itself. Mine site rehabilitation can be expensive, and often the burden falls on the taxpayer rather than the mining company. Why are tailing ponds bad? The […]
How long is a Labs purpose?
How long is a Labs purpose? ten words Are lab reports single or double spaced? Your report must be TYPED, DOUBLE SPACED (except title and literature cited sections), with 1.0 inch margins. All section headings should be typed in all capitals. Indent each new paragraph, rather than skipping two more lines. All papers will contain […]
How fast is considered relativistic?
How fast is considered relativistic? Physics close to the speed of light Special relativity, developed by Albert Einstein, applies to situations where objects are moving very quickly, at speeds near the speed of light. Generally, you should account for relativistic effects when speeds are higher than 1 / 10th of the speed of light. What […]
How are water properties important to life?
How are water properties important to life? Water’s extensive capability to dissolve a variety of molecules has earned it the designation of “universal solvent,” and it is this ability that makes water such an invaluable life-sustaining force. On a biological level, water’s role as a solvent helps cells transport and use substances like oxygen or […]
How high can an airplane fly?
How high can an airplane fly? 31,000 to 42,000 feet How do planes avoid birds? Birds can detect airplane landing lights and weather radar and avoid the airplane. Airplane colors and jet engine spinner markings help to repel birds. Birds seek to avoid airplanes because of aerodynamic and engine noise. Do planes kill birds? Planes […]
Which process does not produce carbon dioxide?
Which process does not produce carbon dioxide? Photosynthesis What produces the most CO2 on Earth? Main sources of carbon dioxide emissions 87 percent of all human-produced carbon dioxide emissions come from the burning of fossil fuels like coal, natural gas and oil. The largest human source of carbon dioxide emissions is from the combustion of […]