What is under beach sand? Often, underneath the loose sand of a beach is a layer of hard, compacted sand, which could be on its way to becoming sandstone if the necessary cement, pressure and heat ever appear — and if is not eroded by severe storms. What is made from sand? Industrial sand is […]
What does refractive index indicate?
What does refractive index indicate? Refractive index, also called index of refraction, measure of the bending of a ray of light when passing from one medium into another. Refractive index is also equal to the velocity of light c of a given wavelength in empty space divided by its velocity v in a substance, or […]
How many galaxies have we named?
How many galaxies have we named? All in all, Hubble reveals an estimated 100 billion galaxies in the universe or so, but this number is likely to increase to about 200 billion as telescope technology in space improves, Livio told Space.com. What are the 4 types of galaxies? In 1936, Hubble debuted a way to […]
How much louder is 6 dB?
How much louder is 6 dB? The established reference is 10dB for twice as loud in perception, based on peer review and subjective comments from a cross section of human subjects in experimental lab conditions. Certain absolutes are simply references we go by. In many examples, some of these absolutes can be shown to be […]
What does a dew point of 69 mean?
Which atom will never form a double bond?
Which atom will never form a double bond? The double bond rule states that chemical elements with a principal quantum number greater than 2 for their valence electrons (period 3 elements and lower) tend not to form multiple bonds (e.g. double bonds and triple bonds) with themselves or with other elements. Can carbon form a […]
How do you tell the difference between independent and dependent variables?
How do you tell the difference between independent and dependent variables? The independent variable is the one the experimenter controls. The dependent variable is the variable that changes in response to the independent variable. The two variables may be related by cause and effect. If the independent variable changes, then the dependent variable is affected. […]
Can hydrogen be produced from sea water?
Can hydrogen be produced from sea water? “The only sustainable way to do that is to use renewable energy and produce it from water. So, the holy grail of producing hydrogen would be to combine the seawater and the wind and solar energy found in coastal and offshore environments.” Despite the abundance of seawater, it […]
What are the 5 examples of sedimentary rocks?
What are the 5 examples of sedimentary rocks? Examples include: breccia, conglomerate, sandstone, siltstone, and shale. Chemical sedimentary rocks form when dissolved materials preciptate from solution. Examples include: chert, some dolomites, flint, iron ore, limestones, and rock salt. What are the 3 main types of sedimentary rocks? There are three different types of sedimentary rocks: […]
What are six steps of the scientific method?
What are six steps of the scientific method? The scientific method consists of six steps: Define purpose. Construct hypothesis. Test the hypothesis and collect data. Analyze data. Draw conclusion. Communicate results. Which of the following lists the scientific method in the correct order? There are four basic steps involved with the scientific method. The usual […]