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Scientific Method
The scientific method is the basis of scientific investigation. A scientist will pose a question and formulate a hypothesis as a potential explanation or answer to the question. The hypothesis will be tested through a series of experiments. The results of the experiments will either prove or disprove the hypothesis. This category should contain questions and answers regarding the scientific method.
4,392 Questions
List and describe three steps of the scientific method?
The first three steps of the scientific method are the hypothesis, prediction and testing. You hypothesis is what your educated guess about the experiment. Your prediction is what you think will happen and the testing is actually performing the experiment.
Why can't heat energy travel through space by conduction or convection?
Both of these methods require the presense of matter.
Both of these methods require the presense of matter.
Both of these methods require the presense of matter.
Both of these methods require the presense of matter.
What is the melting point of blue tourmaline?
Between 1012 and 1102 degrees Celsius. The melting point varies greatly since there are many different compositions of tourmaline.
Taken to improve the accuracy of observations?
Improving the accuracy of observations can be achieved by increasing sample size, using precise measurement tools, minimizing biases in data collection, and conducting repeated measurements for validation. Through these methods, the reliability and credibility of observations can be enhanced to provide more accurate results.
What is the melting point of galena?
The melting point of galena, which is the natural mineral form of lead(II) sulfide, is around 1,114 degrees Fahrenheit or 600 degrees Celsius.
Sequence of scientific method?
The scientific method involves making observations, forming a hypothesis to explain the observations, conducting experiments to test the hypothesis, analyzing the data collected from experiments, and drawing conclusions based on the results. This process is iterative, with scientists revising their hypotheses and conducting further experiments to refine their understanding of a phenomenon.
How does a helium balloon float but not a balloon filled with air?
Helium is a lighter element compared to air, helium also has fewer molecules than air.
How do you use compressibility in life?
Compressibility is used in various applications such as scuba diving equipment, hydraulic systems, and medical imaging technologies. In scuba diving, compressibility of gases is important for understanding how pressure changes at different depths affect the volume of gas in tanks. In hydraulic systems, compressibility of fluids is taken into account for designing efficient and effective systems. In medical imaging, compressibility of body tissues is utilized in techniques such as ultrasound to generate images for diagnostic purposes.
What properties of a ball will cause it to roll more rapidly down an incline?
If its heavier it will roll down faster, so its weight. And also what material is on the outside of the ball
Its weight does not affect the speed at which is rolls down the hill since weight refers to mass times the gravitational force applied to the ball. Mass would be more appropriately used than weight. Also, if the material on the outside of ball is smooth, the ball rolls down faster due to less friction being applied to the ball from the surface. If the ball's outside material is rough like sandpaper, it will move slower down an incline because there is more resistance (Force of friction) between the ball and the surface.
The first answer is mostly wrong. The second is mostly wrong.
The material on the outside of the ball will have an effect due to frictional forces.
The mass of the ball will have an effect, but in a complicated way. If the ball was sliding, it would be irrelevant, but it is not, so the moment of inertia must be considered. As a result, with uniform density, a heavier ball will roll slower. However, the distribution of the mass will also play a huge role, so knowing just the mass is not sufficient.
What is the correct order of the cortical regions?
The correct order of cortical regions in the brain starting from the front is: frontal lobe, parietal lobe, occipital lobe, and temporal lobe.
How do you produce electricity to power a toy car?
You can power a toy car by using batteries or rechargeable battery packs. The batteries supply electrical energy to the electric motor in the toy car, which then converts the energy into motion to make the car move.
Avogadro's hypothesis states that equal volumes of gases at the same temperature and pressure contain the same number of molecules. This principle helped establish the concept of the mole as a unit for measuring the amount of substance.
Why is weight a vector quantity?
Weight is defined as a product of mass nd acceleration due to gravity. It has both magnitude nd weight. Actually acceleration has both magnitude nd direction so is a vector quantity. The product of vector quantity and a scaler quantity gives us vector quantity. As weight is a product of mass nd acceleration due to gravity so its a vector quantity. Moaz khaliq
Why must the outcomes of experiments be repeatable?
Repeatability ensures that results are reliable and not due to chance. By repeating experiments, scientists can verify their findings and increase confidence in the accuracy of their conclusions. It also allows for the validation of scientific theories and promotes transparency and credibility in the scientific community.
What is the method used to collect a gas?
Gas can be collected using various methods such as downward displacement of water, over water displacement, or through absorption into a liquid. The choice of method depends on the physical and chemical properties of the gas being collected.
Why is it important to transform energy?
1. We don't always want energy in one specific form. The Sun gives us heat, or gasolene has chemical energy stored, but to move our car... well, quite simply, that's another kind of energy.
2. Energy is often transformed to an "intermediate" form, for easy transportation. Usually electricity, which humans have learned to transfer efficiently over great distances.
1. We don't always want energy in one specific form. The Sun gives us heat, or gasolene has chemical energy stored, but to move our car... well, quite simply, that's another kind of energy.
2. Energy is often transformed to an "intermediate" form, for easy transportation. Usually electricity, which humans have learned to transfer efficiently over great distances.
1. We don't always want energy in one specific form. The Sun gives us heat, or gasolene has chemical energy stored, but to move our car... well, quite simply, that's another kind of energy.
2. Energy is often transformed to an "intermediate" form, for easy transportation. Usually electricity, which humans have learned to transfer efficiently over great distances.
1. We don't always want energy in one specific form. The Sun gives us heat, or gasolene has chemical energy stored, but to move our car... well, quite simply, that's another kind of energy.
2. Energy is often transformed to an "intermediate" form, for easy transportation. Usually electricity, which humans have learned to transfer efficiently over great distances.
Why does darker colors absorb more heat than lighter colors?
Darker colors absorb more heat than lighter colors because they absorb a broader spectrum of light, including more of the infrared wavelengths responsible for heat. This increased absorption leads to more heat energy being retained by the darker color. Lighter colors reflect more light and heat, reducing the amount that is absorbed.
What is a catchy title for a science project about sports balls?
"Bouncing into Science: Investigating the Physics of Sports Balls"
What is a scientific endeavor?
A "scientific endeavor" is simply an experimental process or investigation. This could include collecting data, observing a natural process, or analyzing the results of an event or other activity.
An "endeavor" could be any of innumerable projects, such as discovering a new building material, locating gravitational anomalies, or examining astronomical photographs.
Will static electricity and your hair make energy?
As name imply static electricity is a static accumulation or depletion of electrons, meaning the electrons don't move, so no current is produced, only an electrostatic field. Static electricity appears when a mechanical cause changes the location of the electrons (maybe even remove them from where they are), and the condition is that these electrons cannot come back to where they were (said otherwise the material used must be an insulator). At the atomic level this cause has created ions which are atoms with more or less electrons in their cloud than the number of protons in their nucleus.
To create electrical energy from this situation we need to create a current, which is a flow of electrons. To do that we will connect together a region with depletion of electrons to a region with excess of electrons (compared to the number of protons). Doing that we'll transform potential energy into kinetic energy. The kinetic energy that will be created by this transformation is proportional to the number of electrons to move until some balance is found (electrons are balanced over all atoms, there is no difference of potential). Note that this doesn't mean the ions will disappear and the number of electrons will be the same than the number of protons. Just there will be the same excess everywhere, or the same depletion everywhere.
From the definition of the volt, we can compute the number of joules created, and this number is the energy.
We'll obtain something like a few microjoules. That's energy but that's not much! To lighten up a light of 1 watt during 1 seconde, we already need 1 joule.
A usual misunderstanding is that the difference of potential created by the static electricity can be very important. But you need to think of that like water in a dam. We indeed create energy from this water by changing its height from the dam to somewhere below in the valley. The more the height of the water, the most the energy we can produce (transform...). But what about a single drop of water at 1.000 meters above the ground? It won't produce any energy when reaching the turbine of the dam.
This is the same for electricity, the potential is the height of the water, and the number of electrons is the number of water drops in the reservoir. With static electricity we have a few drops at very high height, and in the end this doesn't produce much energy.
What about the potential (voltage) of the static electricity? This is simple to understand.
Electrons are moved by some cause so that they are not anymore well distributed in space, there is an area where they lack (positive ions), and another were they are to many (negative ions). They lay on a material not conductive of electrons (an insulator). So said otherwise: for the electrons to redistributed themselves correctly, they need to move thru the insulator or thru the air, from where they are too many to were there are too few. Why would they do that? Because of the electrostatic field created by this unbalance. If we increase the level of unbalance (by adding or removing electrons at some location), we increase the electrostatic field. At some point in time the insulator or the air won't be able to counter this force and the electrons will start to move. This move will be difficult because the insulator (the air too, it is also an insulator) offers a large resistance to electronic move (which is another name for electrical current) by definition. This will create heat in the insulator. Very large heat. This heat will in turn change the nature of the insulator by creating ions in the insulator (said otherwise by moving electrons belonging to the insulator atoms). But ions actually conduct electricity (also by definition), so this will ease the work of electrons to find their way in the insulator, which is no more an insulator in this small area where the ions have been created... More electrons will move, and this will create more heat and more ions. Etc. As soon as the phenomenon is started it will continue and the result is that a very high number of electrons will move in the insulator creating a very hot channel.
What was described above it just what we call an electric arc...! This is why you see (in the night) or hear sparks when you brush your hair. You are just creating arcs at very hot temperature locally, and the light is just a tube of atoms that have been ionized at a point that they become plasma. Plasma, the forth state of the matter like in the stars, just in your hair.
What we know by test in laboratory is that in dry air, we need a difference of potential of 4.000 V to create an arc between areas at a distance of 1 cm. So to create an arc of 1 mm we need at least 400 V. Look at the length of the arcs in your hair and calculate the difference of potential needed to create it in dry air.
Why is an oar a second class lever Giving reasons?
The answer is that it is NOT.
It is a first class lever.
"Class 1: the fulcrum is located between the applied force and the load. Example: the crowbar" - Wikipedia
In regular use, the fulcrum of the oar is attached to the top side or edge of the water craft, which is between the force being applied by the rower and the "load", being the resistance of the water itself.
This makes the oar a classic example of a first class lever.
What is the melting point for sulfite?
Sulfite is an organic compound with the chemical formula SO3 and a net charge of -2. It does not exist by itself but is usually found in the form of a salt, such as Na2SO3. The non ionic form, sulfur trioxide, has a melting point of 16. 9 degrees Celsius.
In an experiment the factor of interest is called?
The factor of interest in an experiment is called the independent variable. This is the variable that is manipulated by the researcher to determine its effect on the dependent variable.
What is the melting point for steam?
Steam does not have a melting point because it is the gaseous form of water. The melting point of water, which is the point at which solid ice turns into liquid water, is 0 degrees Celsius or 32 degrees Fahrenheit.
What is the difference between pinciple and law?
There can be errors in the execution of the Law but there can be no errors in the execution of the Principle. The Principle operates in ideal conditions.
In Principle the right triangle is 90 degrees; in practice you may never construct a right triangle of 90 degrees. The Principle of Conservation of Matter-Energy does not allow for missing matter-energy; The Law of Conservation of Matter-Energy allows for missing matter-energy if the missing part can be said to reside in error.
