0
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 is the energy transfer in running?
The energy transfer in running involves converting chemical energy stored in food (mainly glucose) into mechanical energy to move the muscles. This process is facilitated by mitochondria in the cells, which produce ATP (adenosine triphosphate) for muscle contraction. Additionally, some energy is lost as heat during running due to inefficiencies in the energy conversion process.
Who invented the bouncing egg trick?
The bouncing egg trick is a classic science demonstration that dates back many years and does not have a single inventor. The trick showcases the strength of an egg's structure by demonstrating its ability to withstand pressure when placed on its end. It is a simple yet impressive way to teach about forces and materials science.
How can you make a home-made pussy with the everyday things you use?
Take A Damp Towel roll it up and make sure its warm and then try that
A person who studies physics is known as?
Ah, what a lovely question! A person who studies physics is known as a physicist. They explore the fundamental laws of nature and how the universe works. It's a beautiful journey of discovery and understanding the world around us.
What atoms is oxygen made out of?
Oxygen is an element made up of 8 electrons, 8 protons, and 8 neutrons. In nature oxygen in its pure form is only found as two oxygens bonded together because of its valence electrons. It only has 8 neutrons most of the time.
What is the difference between weather and climate'?
The difference is that climate is weather that's happening over a long period of time. Weather happens like it's happening right now or it happens one day or another, weather isn't like one year or more.
What household items have low friction?
Household items with low friction include silicone spatulas, non-stick cookware, and waxed dental floss. These items are designed to reduce friction and make tasks like cooking and cleaning smoother and easier.
How many aluminum cans make up one bicycle?
Depends on the quallity level of the bike.
Generally most parts are, and the frames on medium to good bikes are. They use aluminum alloys.
Very good bikes use carbon fibre frames.
Also the SI name is aluminum.
If you ran 400 m in 80 seconds what would be your speed?
To calculate speed, you would use the formula speed = distance / time. In this case, the distance is 400 meters and the time is 80 seconds. Plugging these values into the formula, we get speed = 400 m / 80 s = 5 m/s. Therefore, your speed would be 5 meters per second if you ran 400 meters in 80 seconds.
Scientific appeal refers to the credibility and trustworthiness of information backed by scientific evidence, data, and research. It is based on empirical observation, objective analysis, and adherence to the scientific method. Scientific appeal helps to distinguish reliable and accurate information from opinions or beliefs without scientific support.
What are Animals whose body temperature usually stays the same?
Animals whose body temperature usually stays the same are known as "endotherms" or warm-blooded animals. This includes mammals and birds. They can regulate their body temperature internally to maintain a constant level, even when the environmental temperature changes.
What does it mean when a constalation is described as flat?
When a constellation is described as "flat," it means that the stars within the constellation appear to lie in the same plane when viewed from Earth. This can give the impression of a two-dimensional shape or pattern in the sky. The flatness of a constellation is a result of the relative positions of the stars within it as seen from our vantage point on Earth.
How do you dissolve plaster of Paris?
"I think vinegar is supposed to work.
Lawren1
The CRC Handbook of Chemistry and Physics (65th ed. Special:Booksources) lists plaster of Paris (calcium sulphate half-hydrate, CaS04.1/2H2O) as soluble in acid, ammonium salts, sodium thiosulphate (Na2S2O3) and glycerin."
I am so surprised that so many people on so many forums, obviously don't have a clue about the chemistry of plaster of Paris. I read in so many places things like "uh, try some kind of acid..."
So I have a lot of concentrated chemicals on hand and did lots of experiments with all kinds of acids, both dilute and concentrate, under many conditions and determined that none of my dozen or so acids dissolve Plaster of Paris in any way, but sometimes make it harder.
The chemicals which dissolved plaster of Paris are on the basic end of the PH scale, not acid. I first had some success with potassium cyanide, but what really worked better than anything is Sodium Bicarbonate. Makes sense. The sodium in baking soda hooks up with sulfur in the plaster, and the carbon hooks up with the calcium in the plaster.
TO BEST DISSOLVE PLASTER OF PARIS PLACE IT IN WARM WATER WITH LOTS OF BAKING SODA.
Don't use any acids or it will only defeat the process.
Now what really amazes me is that the answer is so simple and safe, and surely some people must know it, but it apparently cannot be found on the internet, until now.
Or you can chisel it away because it is soft enough to do so.
Half of 1 liter is 500 milliliters. It's like cutting a cake in half, but with liquid. So grab your measuring cup and pour out that 500 ml of liquid gold. Cheers to your newfound knowledge!
Yes, a bed can act as an insulator by providing a barrier between your body and the colder air in the room. Mattresses, blankets, and sheets all contribute to trapping and retaining heat, helping to keep you warm while you sleep.
When can friction not be useful?
friction is generally useful only if u consider the instances of walking and writing using the friction between pen and paper but otherwise it is mostly not useful as an example the parts of a machine can get regularly damaged due to friction in between the various parts and reduce its life
Another contributor wrote: We can learn a lot about the natural attributes of friction from nature. Nature, over millions of years, has adapted to various environments both to use friction and avoid its "un-useful" effects. For example, friction wears down joints between bones in the human anatomy. However, to avoid damaging friction, the body utilizes remarkable articular cartilage -- 80% water suspended in a porous material -- to absorb blows and reduce friction. While remarkably durable, over time, friction can wear away at the cartilage eventually creating pain and arthritis. So, in this instance, friction is both good and bad. The friction between feet and the ground produce movement, but the friction between the joints can eventually produce the failure of those joints.
Friction enables birds to fly, snowflakes to grow, and gazelles to run; but it also slows down the universe, creates damaging heat in electronics and wears down the tires on your car.
It is both positive and negative -- an asset and a liability. The trick is to make it work for you while minimizing its negative affect.
Anytime you want speed.
when is "friction" not usefull
There are a lot of times where you do not want any friction, like if you go bowling. Or if you like to play curling.
When you want travel at a constant speed for example.
If an object was at a constant speed and you wanted it to stay at that speed without a resultant force, there would have to be no friction (and no drag). This would be useful as it wouldn't require energy to stay at that speed. Free energy, but it doesn't exist unfortunately.
What are everyday things that expand and contract?
By heating matter, the particles vibrate more in their same space, taking up more space causing the matter to expand (expansion)
By cooling matter, the same happens, but the other way so the particles vibrate less causing the matter to contract.(contraction)
How can you separate carbon dioxide from fizzy drinks?
You remove the pressure. In the case of carbonated drinks, you remove the cap or open the can. The carbon dioxide will evaporate from the liquid.
Pour a cup of your carbonated soda (pop for those folks in New England) and leave it to sit for a couple of hours. Then taste it; it should taste 'flat' to you because the 'fizz' gives a sharpness to the taste of the soda. Another (more technical) experiment is to open a bottle of carbonated soda and place a deflated balloon over the mouth of the bottle; it has to be a tight fit so the gas can't escape. Depending on the amount of carbon dioxide in the bottle, it may be enough to lift the balloon upright or even inflate it to a degree.
What is the humidity in a tornado?
The humidity is generally going to be high as tornadoes form from thunderstorms. Within the tornado itself the relative humidity may be 100% as the pressure drop causes temperature to fall below the dew point, triggering condensation and creating the funnel.
Give 2 similarities and 2 differences between the way coal and oil was formed?
Similarities:
- Both coal and oil are fossil fuels formed from the remains of dead plants and animals.
- Both coal and oil formation process involves the decomposition of organic matter over millions of years under high pressure and temperature.
Differences:
- Coal is primarily formed from ancient plant matter, while oil is formed from the remains of marine organisms.
- The formation of coal requires anaerobic conditions (low oxygen) and occurs on land, while oil formation occurs in marine environments under specific conditions such as lack of oxygen.
Which kingdom has the smallest number of species?
This is called the hierarchy of biological classification., going from most member to a specific member. Staring with the most general: life, domain, kingdom, phylum, class, order, family, genus, species.
