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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

What branch of science does pasteurization belong to?

Pasteurization belongs to the field of microbiology, specifically within the subfield of food science. It involves heating a liquid (usually milk) to a specific temperature for a set period of time to kill harmful bacteria and pathogens while preserving the quality of the product. This process was developed by Louis Pasteur in the 19th century and is widely used in the food and beverage industry to ensure product safety.

Which chemical family is composed of elements that have full valence shells?

Valence shells mean that the outermost orbits of electrons are full. Recall that from the inside out, the number of electrons for a shell to be full are: 2, 8, 8, 8, etc... So, Helium, He (2) has a filled shell. Neon (10) has a filled inner shell (2) and a filled outer shell (8): 2 + 8 = 10. Argon (18) has a filled inner shell (2), another filled shell (8), and a valent shell (8): 2 + 8 + 8 = 18. The family is composed of the non-reative Noble Gases.

Is cardboard a non metal?

Well, isn't that a happy little question! Cardboard is not a metal, it's actually made from paper and other fibrous materials. Just like how we use different colors to create beautiful landscapes, cardboard is made by layering these materials together to form a strong and versatile material. So, remember, whether it's metal or cardboard, each has its own unique beauty and purpose in this world.

Forensic science a to z challenge including mystery word?

This is something you will have to play the game to figure out. This will be a part of the challenge to figure out the keyword.

How do you convert 1 metric ton of diesel fuel to gallons?

There are 1000 kilograms (kg) in a metric ton (or tonne). And there are about 0.264 gallons in a litre. Also, the density of diesel fuel is right at about 0.85 kilograms per litre. Since you have a metric ton of diesel fuel, that is 1000 kilograms of diesel fuel, you need to know how many litres of diesel fuel you have. Divide 1000 kg by 0.85 kg/litre and you'll get about 1176.5 litres. Now convert that to gallons by multiplying 1176.5 litres by 0.264 gallons/litre and you'll get about 310.6 gallons of diesel fuel in that metric ton you started with.

What are some tundra facts?

  1. Tundra is a biome characterized by cold temperatures, low precipitation, and permafrost.
  2. It is found in the Arctic and alpine regions of the world.
  3. Tundra ecosystems have a short growing season and are home to species like caribou, Arctic foxes, and polar bears adapted to survive in harsh conditions.

What is Disadvantage of knowledge?

Well, honey, having knowledge can sometimes be a double-edged sword. It can make you aware of all the messed up stuff going on in the world, which can be a real downer. Plus, knowing too much can lead to analysis paralysis, where you overthink everything and end up doing nothing. So, yeah, knowledge is power and all that jazz, but it's not always rainbows and butterflies.

What is a change in the position of an object compared to a reference point called?

any change NOT involving a change in the substances chemical identity- type of matter is still the same

for ex. you cold change the texture, volume, shape, mass, size, weight, color, density, or odor.

More scientifically, it's a change that doesn't involve altering the chemical makeup of an object.

I'll give a few examples.

Take a glass window and break it. Now, instead of one pane of glass, you have many small shards of glass- but they're still glass!

Take water and freeze it. Ice is simply water in a different phase, it's still molecules of h2o, so chemically it is the same.

Take a piece of copper wire and bend it. The physical properties of the wire are now different- it has a bend in it. But it's still copper!

An example of a change that's not physical, but chemical, would be rusting iron. When iron rusts it becomes chemically different, a compound called iron oxide (Fe -> FeO).
Physical change is a change which takes place without any process of mixing of chemicals. It is a process of change in matter by manual method. If matchstick is burnt the burnt part cannot be regained. This is called chemical change.If the paper is crushed it can be regained to its original shape. this is called physical change.
so basically a pyhsical change is any change NOT involving a change in the substances chemical identity- type of matter is still the same

What is steady deflection?

When battery key and galvanometer key are pressed together ..throws comes out on the meter scale which goes on either side and stop there..that is steady deflection...

What is your favorite area of study why do you like it.?

It's your personal opinion they want. So it's no good asking others what your personal favorite is and why.

What is the density of chocolate?

The density of chocolate can vary depending on its composition and temperature. On average, the density of solid chocolate is around 1.2 to 1.6 grams per cubic centimeter. However, when chocolate is melted, its density decreases due to the increased volume and decreased mass. It is important to note that the density of chocolate can also be influenced by factors such as sugar content, cocoa butter content, and any added ingredients.

What is the balanced equation of incomplete combustion of pentane in air?

The incomplete combustion of pentane in air typically produces carbon monoxide and water vapor. The balanced chemical equation for this reaction is 2C5H12 + 11O2 → 5CO + 6H2O. This equation shows that two molecules of pentane react with 11 molecules of oxygen to produce 5 molecules of carbon monoxide and 6 molecules of water. It is important to note that incomplete combustion can also produce other byproducts such as soot and carbon dioxide.

Terry weighs 2016 ounces on earthhow much would she weigh on the moon?

Well, isn't that just a happy little question! On the moon, Terry would weigh about 1/6th of what she weighs on Earth. So if Terry weighs 2016 ounces on Earth, on the moon she would weigh approximately 336 ounces. Just imagine all the gentle moonlight she would be dancing under!

What is the meaning of crazy like a wedge?

I woud have to say that this refers to a wedge that was used to pound on in order to create a wedge between two things. From excessive pounding the wedge would be worn. Thus, over time, a mental beating - whether physical or intellectually - would make someone crazy.

. is the distance from one crest to the next crest or one trough to the next trough?

When observing a wave, the distance between the highest point in the waveform to the next peak would be the wavelength and it's equal to the rate that the wave is moving (in meters-per-second: m/sec) multiplied by the frequency of the waves (in Hertz: Hz "occurrences per second"). The answer would be in meters per occurrence, meaning how many meters are there from crest to crest.

How to load paper canon palm printer p1-dh v?

I just successfully completed the task of loading paper into the canon palm printer p1-dh v. My problem was that the paper was not being grabbed by the "Feed" button. Where I was guiding the paper, after feeding the paper through the back of the machine (the slot is located on the outside of the back of the machine), the paper naturally wanted to enter underneath the black plastic plate where it would end up underneath the entire printing mechanism. As the instructions indicate, the paper does not actually feed "under the black plastic plate", it should feed through it. There are two rectangular silver tabs, one on each side of the proper paper entry slot. I cut the paper at a very slight angle (edit:actually, if you cut it into a truncated triangle, it's even easier!) and finally found the magic entry point. Because the machine is so tiny, that entry slot is almost invisible, except for those two silver tabs. After you manage to insert the end of the angled cut through the "invisible slot" be sure the entire edge of the paper actually enters the slot so that when you push the "Feed" button, the paper is grabbed and fished through evenly. (edit: If the paper cannot be advanced by the "Feed" button, remove the plastic cover by pushing it toward the direction of the arrows on the left side which are embossed directly on the clear plastic cover and pull the paper manually. When reinstalling the cover put the front end in first, make sure the entire cover is flat to the printer case, then push the front slightly toward the back and finally slide the cover forward until it is seated). Hope this helps somebody! (edit: It sure did!) I found that folding the end of the paper into an arrow and then watching the feed button rotate, I could then easily see where the paper should be inserted. With it folded like that, it went in like a hot knife in butter.

Your answer did the trick for me! I have also found it easier to store the paper inside the machine, using the arm only when printouts get really long, just to prevent accidentally entering the back slot. Works much better than having the roll fall off and unravel.

I found a washer about an inch in diameter with the hole in the middle just large (or small) enough to fit over the paper arm. It holds the roll on and since it has to be tilted to fit on the arm it wont fall off while handling the printer. BTW...your solution kept me from trashing this great little printing calculator.

Is felt a good insulator?

Felt is a decent insulator, but it's not going to blow your socks off. It's like that friend who's always there for you but won't win any awards for being the most effective. So yeah, felt will keep some heat in or out, but don't expect it to work miracles.

How can you convert cm to ml?

Well, honey, you can't convert centimeters to milliliters because they measure different things. Centimeters measure length, while milliliters measure volume. It's like comparing apples to oranges, just not gonna happen. So, let's keep those units in their own lanes, shall we?

What liquid freeze quicker?

Water typically freezes faster than other liquids like milk or juice due to its lower freezing point and its ability to conduct heat more efficiently. Additionally, the purity of water can affect its freezing time, with distilled water typically freezing faster than tap water due to the absence of impurities and minerals.

Why does a water ice cube melt faster than a milk ice cube?

A water ice cube melts faster than a milk ice cube because water has a lower freezing point compared to milk. This means that the water ice cube will reach a higher temperature threshold more quickly, causing it to melt faster. Additionally, milk contains fats and proteins that can insulate the ice cube and slow down the melting process.

How do you know if a sample of matter is a mixture?

A substance is scientifically defined as matter the has the same composition and properties throughout, so substances are elements and compounds. Mixtures are not considered substances. However, if we are taking the word substance to simply mean "something" as in everyday (and not purely science-based) use, then one could use the following criteria:

A compound is a substance whose smallest unit is made up of atoms of more than one element chemically bonded together, such as carbon dioxide (CO2), water (H2O), sugar (C6H12O6), and ammonia (NH3). A pure sample of a compound will appear the same throughout, and always occurs in specific proportions of its constituents. For example, pure sugar is always composed of molecules of C6H12O6 and always occurs in that proportion--6 atoms of Carbon, 12 atoms of Hydrogen, and 6 atoms of Oxygen. Compounds can only be formed or broken down through a chemical reaction.

A mixture is a combination of substances (elements or compounds) can either be homogeneous or heterogeneous. Heterogeneous mixtures do not look the same throughout, so they are easily distinguished from compounds. Homogeneous mixtures (or solutions), like tea, Kool-Aid, blood, brass, and sugar water, are only physically bonded together and can be separated through physical means.

How many toes does a giraffe have?

A giraffe has two toes on each foot, just like other animals in the Giraffidae family. These two toes are known as hooves and are covered in tough skin for protection and support. This unique hoof structure helps giraffes move easily across various types of terrain and provides stability while standing or running.

What is 300 000 000 000 000 000 000 000 000 000 000 in words?

The number 300,000,000,000,000,000,000,000,000,000,000 can be expressed as "three hundred undecillion" in words. In scientific notation, this number would be written as 3 x 10^38.

Is a 113 IQ average for 12 year old female?

100 is the average IQ whatever your age. A variance of plus or minus 10 points is considered within expected deviation.

100 is the average IQ, but it does vary on age. An IQ of a 113 for an adult is above average, so this should be slightly better for someone younger.

140 (Standard deviation of 20) or above is considered eligible for MENSA.