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Science
The observation, identification, description, experimental investigation, and theoretical explanation of phenomena is all part of science. Nothing is immune to the scientific process: from charm quarks that haven't existed naturally since the beginning of time to Pluto, recently demoted from planet to dwarf planet. Questions on knowledge about the material and physical aspects of our world are asked and answered here.
203,801 Questions
How many cubic feet of air are in one pound of air?
About 0.075 lbs. Caculated using the ideal gas law: PV=nRT. Assuming the T=68F (528R) and P=1atm with the MW of air approx. 28.8 lb/lb-mole. The gas constant R, using these units is 0.7302. Rearranging the formula to give: mass = MW*(PV/RT) Hope this helps.
If measured at sea level it's 25,401.6 lbs per square foot. That is using the number of square inches in a cube 1,728.
What is cobalt's strength of electrostatic force?
The strength of the electrostatic force depends on the electric charge. If you have a block of cobalt - or of just about any other material for that matter - you can put a positive charge, a negative charge, or no charge on it; and the charge can be large or small.
What books did Fibonacci write?
Fibonacci, also known as Leonardo Pisano, was a member of the Bonacci family and wrote several books. The surviving books are Liber abaci (1202), Practica geometriae (1220), Flos (1225), and Liber quadratorum.
What is the identity of a cube of metal that measures 1.2cm on each side and the mass of 15.4g?
To measure the mass of a metal cube. First find it's volume, V = L (length) x W (width) x H (height), since it's a cube the L, W, and H are all the same so, V= L^3= H^3= V^3. Then you look up the density in a table or on the internet and multiple the density by volume to get mass. V = L (length) x W (width) x H (height) m = V * density (row)
What are some non examples of ADP?
Well, darling, let me break it down for you. Non-examples of ADP would be things like bananas, unicorns, and the Loch Ness Monster. Basically, anything that is not an actual adenosine diphosphate molecule would qualify as a non-example. Hope that clears things up for you, sugar.
What are the similarities of a human and a machine?
No. They are machines and human beings are living things. Computers have a limited set of capabilities which are defined by people who make them and program them. They don't have a true ability to think, just the ability to do what they are programmed to do. They don't have any human characteristics, like emotions or the capability to be tired or bored. This makes them good for doing tedious and repetitive tasks, which is what they are often used for.
Where is the fulcrum in a broom?
The fulcrum in a broom is located at the point where the handle meets the sweeping part of the broom, known as the head. This is where the broom pivots when you apply force to sweep debris. The placement of the fulcrum is crucial for maximizing the leverage and efficiency of the sweeping motion.
What is the scientific name for beautiful?
Well, honey, the scientific name for beauty is subjective and varies from person to person. There's no specific scientific term for "beautiful" because it's more of a concept than a tangible thing. So, you can call it whatever you want, just make sure it makes you feel fabulous.
Is compressing air or liquid useful?
"There could be, but it would be a gas. (Short answer: No)"
This is not entirely true. We deem a liquid as "incompressible" only because it's degree of compression is sufficiently small. That being said, and to be pedantic, liquids are on some level compressible.
As the liquid (the water) is approaching the critical point, it expands, its density decreases and ***ITS COMPRESSIBILITY INCREASES***. As for the steam, it gets more and more dense. After the critical point, the properties of the ``liquid'' are indistinguishable from that of the steam, and the ``surface'' between them disappears.
http://www.britannica.com/EBchecked/topic/343026/liquid/51878/Behaviour-of-substances-near-critical-and-triple-points
http://en.wikipedia.org/wiki/Critical_point_(thermodynamics)#Table_of_liquid-vapor_critical_temperature_and_pressure_for_selected_substances
You can watch the process directly, thanks to experiments done with camera:
http://www.youtube.com/watch?v=CgFrAOe4ZgI
http://www.youtube.com/watch?v=yBRdBrnIlTQ
Supercritical fluids in nature:
- ``Black smokers'' in deep marine bottoms
- Venus's athmosphere near the surface
What phase is carbon dioxide in at 20C and 25 ATM pressure Using the phase diagram for CO2?
solid, I just took the text on apex
What does CIF mean in the same sentence as GFE?
GFE stands for "Girl Friend Experience" and is a slang term for the description of a type of prostitute.
CIF stands for C** (slang term for ejaculate) in (on) face.
When CIF is used in the same sentence as GFE, it means a prostitute who will allow, possibly for an addition fee (example: "CIF +$50") or not allow (example "NO CIF") the customer to ejaculate on their face.
No. Oxygen is an element that typically comes in the form of O2. Air is a mixture of gasses and Oxygen is just one of them. Air is about 21% oxygen and 78% nitrogen with another 1% being a variety of other gasses.
Why businessman is more important than farmer?
Well, sweetheart, let me break it down for you. Businessmen and farmers both play crucial roles in society, but if you're talking about importance in terms of money and power, businessmen usually come out on top. They make deals, drive the economy, and often have more influence in the grand scheme of things. But hey, let's not forget who puts food on our plates at the end of the day - those hardworking farmers deserve some serious credit too.
What is the maximum number of shells or orbits in an atom?
2 per (sub) orbital:
In total
2 in (the only) s orbital,
6 in (3x) p orbitals
10 in (5x) d orbitals
14 in (7x) f orbitals
18 in (9x) g orbitals
22 in (11x) h orbitals etc. etc. but the last ones are improbable to exist in 'our universe'
How do you calculate wave speed without the wavelength?
You can measure the wavelength without knowing the frequency. This is done by measuring the "nodes" between similar points of a single-frequency continuous wave. All you need is some simple lab equipment. http://www.ted.com/index.php/talks/view/id/237 [the guy measures the wavelength]
You can calculate the wavelength as follows: Wavelength times Frequency =Velocity (phase velocity in that medium) So the speed of sound in air is about 344 m/s. If the frequency is 1000 Hz, then the wavelength is 344/1000=.344 m. But in this simple relationship you can't call both wavelength and frequency unknowns. You have to have in hand one or the other. See: http://en.wikipedia.org/wiki/Wavelength
What is pi to 13 decimal places?
Pi to 13 decimal places is 3.1415926535897. Pi is a mathematical constant representing the ratio of a circle's circumference to its diameter. It is an irrational number, meaning it cannot be expressed as a simple fraction and its decimal representation goes on infinitely without repeating. The value of pi is commonly approximated as 3.14 for practical calculations.
What are three examples of on site transportation?
Well, honey, on-site transportation could be anything from a golf cart to a forklift to a good ol' pair of roller skates. As long as it gets you from point A to point B within the confines of a particular location, you're in business. Just don't try riding a llama - they tend to spit when they're not in the mood for a joyride.
Whats the meaning of like begets like?
Certain attitudes or outcomes lead to or create more of the same attitudes or outcomes.
Answerit means Off springs resemble their parentsA timeline is useful because it provides an outline of the major points in a person's life, or in a progression of related events. In this way, you can compare the length of time between various actions, and easily note their relationship to other events or actions during the same period of time. The dates in chronological order are presented, without the need to extract them from sentences or paragraphs.
Do all living things have senses?
not all people have 6 senses, but you may have 6 senses. Some 6 senses are different, like making things move, dreaming something and it comes true, telling the future, seeing something that's happening right now miles away, and more.
What elements are in Ethyl Alcohol?
Ethyl alcohol, or ethanol, is composed of carbon, hydrogen, and oxygen atoms. Its chemical formula is C2H5OH.
How many grams of solute are used in 270.0mL of 0.650M ethyl alcohol?
The following solutions should be given so a person will be able to know how many grams of solute would be needed. With this information not given a person will not be able to know how much solute is needed.
What is the name for a group of five people?
A group of five people is commonly referred to as a "quintet." The term "quintet" is derived from the Latin word "quintus," meaning "fifth." In music, a quintet typically refers to a composition for five instruments or voices. In other contexts, a group of five people can also be called a "pentad" or simply a "group of five."
The force of gravity acting on a block in water can be calculated using the formula F = ρ * V * g, where F is the force of gravity, ρ is the density of the block, V is the volume of the block, and g is the acceleration due to gravity (approximately 9.81 m/s^2). Substituting the given values, the force of gravity acting on the block in water would be approximately 627.52 N.
