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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 does energy transformation when you iron your clothes?
When you iron your clothes, electrical energy from the power source is used to heat up the iron. This heat energy is then transferred to the clothes, causing the wrinkles to smooth out. Overall, electrical energy is transformed into heat energy during the ironing process.
If you drop a brick and a penny at the same time which would hit the ground first?
The coin.
The reason is because the tube is filled with air. Air caused air resistance. The feather has much greater air resistance than the coin, so the air will hold the feather up for a bit while the coin will likely turn on it's side and fall quickly.
Now, if it was a tube without air (a vacuum), they would fall at the same rate because there is no air resistance. Gravity acts on the same objects in the same way, essentially. The weight of the two objects is different, so gravity actually puts an amount of force on them differently. However, because gravity does this gravity accelerates both objects at equal speeds.
Is aluminum foil cut in half a physical or chemical change?
Cutting aluminum foil in half is a physical change. A physical change alters the form of a substance without changing its chemical composition. In this case, the aluminum foil remains aluminum foil after being cut in half, just in two smaller pieces. No new substances are formed during this process, so it is considered a physical change.
What is the best way to finger my girlfriend?
To start i always gently go up and down my girlfriends leg. Then i begin to rub her vagina. Then i start with one finger (pointer or index), then a couple minutes into it i add my middle finger. Then i mover my fingers forward and backwards like two legs walking on her g spot. Which is her favorite
Change of state of solid to gas?
The process is called sublimation. Solids can turn directly into gases, and gases can turn directly into solid without ever being a liquid. Carbon dioxide (dry ice) is a common example of this. Other examples are mothballs, solid air fresheners (Air Wick), and iodine.
Inquiry* Inquiry is just a science investigation on an experiment.
What happens to a solid when its cooled?
It depends on what the solid is made out of. Most solids shrink when cooled, and become more brittle. There are exceptions, however, such as ice, which expands slightly at certain temperatures.
What is the meaning of heat number mentioned on steel plate?
Definition: An identifying number assigned to the product of one melting in an electric arc furnace: e.g. 19345. Sometimes, but not universally, the first digit indicates the furnace number; the second digit indicates the year in which the heat was melted. The last three (and sometimes four) digits show that this was the 345th heat melted in No. 1 furnace during 1989.
Why sedimentary rocks are porous?
they are often porous because of fossil imprints and pressure put on them at different spots
When a cart splashes through water it slows down what force acts on the car to slow it down?
The force of friction between the wheels of the cart and the water causes it to slow down. As the wheels push through the water, the water exerts a resistance force in the opposite direction of the motion, reducing the cart's speed.
the paper was a possitive charge
I think the answer sought was Physical Change. {and spelling got in the way.)
Why is the handle of a pan a good insulator?
A metal frying pan handle, covered in a good heat insulating material, means that you don't burn your hand when picking the frying pan off the stove. It also means that you don't have to insulate your hand by using a tea-towel or oven glove.
How many days will it take for a metal spoon to rust in a cup of salt water?
Not all metal spoons are made of exactly the same quality of stainless steel. Do not assume manufacturing uniformity. Furthermore, not all cups of salt water have the same concentration of salt (although if you had specified sea water, then we would have a way to know approximately how salty the water is - even that is not 100% uniform, the sea is not exactly the same everywhere in the world, but it is reasonably close). So there are two unknown variables in the process you describe.
A good quality of stainless steel is remarkably resistant to rust, even when it is immersed in salt water. It could take a really long time.
What is the force of attraction between like molecules?
An attractive force between like particles is a force that causes particles of the same type to be attracted to each other. This force is responsible for the cohesion of atoms and molecules, as well as the attraction between particles in a solid, liquid, or gas. The attractive force between like particles is usually weaker than the force of attraction between unlike particles.
How far does the normal person throw a snowball?
The distance a normal person can throw a snowball can vary based on factors such as individual strength, technique, and snowball size. On average, a person may be able to throw a snowball anywhere from 20 to 50 feet, but some individuals with proper training and practice can achieve distances of over 100 feet. It is important to note that these distances are rough estimates and can differ greatly depending on the specific circumstances.
Is it colder inside a car in winter than it is outside?
Yes it is. This is because the metal of the car conducts cold so it keeps the car as cold as it was outside the car at the coldest point. This will gradually return to the same temperature as outside when the weather heats up some. It can be - a car can be insulated enough that when the air is cold enough, temp A, it reduces the interior temperature to temp B (close but not as low as A), but sunlight and fast moving winds can blow in air warmer than both A and B: the air inside the car is not being blown away and is insulated so it doesn't go up in temp near as much as the air.
According to the psychological tests and measures standards as described in psych classes: Q - What do IQ tests measure? A - IQ Q - What is IQ? A - What IQ measures The significance of an IQ test is that you have demonstrated the ability to get a good score on an IQ test. The assumption is that a high score on an IQ test indicates an intelligence level. A score of 135 indicates that out of a random group of 100 people, only about 5 would be able to get as good or better score.
Answer You asked what such a score means, and I think we can do a better job answering your question with easily verifiable information. Assuming that the score was achieved on a well-regarded, rigorous test such as the Wechsler (WAIS-III or IV), an IQ of 126 suggests a superior intellectual talent shared by only about 1 in every 20-30 people. Such a person would usually be one of the smartest people in a typical grade or middle school classroom. She would often have begun to read earlier than most, and at any stage of childhood, would seem to have a larger vocabulary, more general knowledge and common sense, and greater moral sensitivity, than most children of the same age. She would appear to learn more quickly, but more importantly, would be able to grasp concepts that many same-age persons were not able to, even if given virtually unlimited time.
Later in life, it would not be surprising to see that a person, with the level of talent suggested by an IQ of 126, had graduated college or had even become a physician, lawyer, engineer, scientist, or executive. The typical professional in any of those fields will have an IQ of 120 or more; college graduates typically have IQs of 115 or more. If I were a teacher, parent, or counselor of a child with such intellectual talent (when verified through means other than just the IQ test, such as early development, school grades, etc.), I would certainly encourage the child to tackle greater challenges than are usually offered in the classroom at school, whether via accellerated programs, music lessons, home schooling, or grade skipping.
A CD is not considered a translucent object. Translucent objects allow some light to pass through, but scatter it in different directions, making the object appear blurry or opaque. In contrast, a CD is reflective and opaque, as it does not allow light to pass through it.
To clean the shower you must remove a what formed by tap water and soap?
Oh, dude, you gotta remove the soap scum. It's like this lovely combination of tap water and soap that just decides to stick around in your shower. So, grab some cleaner and say goodbye to that grimy residue!
Which ball size will bounce the highest?
A larger ball size will typically bounce higher than a smaller ball size due to having more momentum and energy when it hits the ground. The elasticity of the material the ball is made of also affects how high it bounces.
What is a solid that forms when two liquids combine chemically?
When two liquids combine chemically, they can form a solid called a precipitate. This occurs when a chemical reaction between the two liquids produces a new substance that is insoluble in the remaining liquid, leading to the formation of solid particles.
Water stored behind a dam is an example of what type of energy?
Water stored behind a dam is an example of potential energy (energy of position). As the water flows through the dam, some of the water's potential energy is converted into kinetic energy (energy of motion), which is typically further converted into electrical energy through the use of spinning magnets and coils of wire.
