0
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
Are the enzymes used up by the reaction?
an enzyme does not get used up in a reaction. it is essentially a catalyst. although an enzyme speeds up the rate of chemical reactions by decreasing the amount of activation energy required, it does not in itself change during the reaction.
***Note:: Enzymes cease to function when they denature. This usually occurs by pH level changes, or increased temperatures. This occurs because it causes the bond of the molecule to break and essentially changes the shape of the enzyme. Because an enzyme is a lock and key model, when the shape changes it becomes useless
sources: my brain
How do you separate sand salt and grit from rock salt?
Rock salt is mined as a solid in salt mines. it does not need to be separated.
Which person is collecting data through the participant observation method?
A. Hassam watches people as they interact.
Why does an objects gets attracted towards moon when it leaves the earth's gravitational field?
The moon orbits Earth because it is held there by Earth's gravity. The moon is going fast enough that it won't hit Earth, but at the same time is being pulled back in at the same rate it flies away. The same is true for why Earth itself doesn't fly into the sun.
the sun is MUCH MUCH MUCH further away than the earth is, so it is attracted to earth because the difference in size and gravity favour the earth. If it was to be attracted to the sun, the sun would need to be bigger or closer (both of which it is doing at aconstant rate, but very gradually over a long perios of time)
How does heat transfer by radiation conduction and convection?
a thermos limits heat transfer through the walls of the thermos. that lets the fluid inside the thermos keeps its temperature nearly constant for a long period of time (whether the temperature is hot or cold).
Maxwell's inductance capacitance bridge?
The Maxwell Bridge is known as an AC bridge. This bridge is used to find the self inductance and the whole amount of a circuit.
What if hypothesis is not supporter by the data has been collected and analyzed?
When a hypothesis is not supported by data, two possibilities exist. The hypothesis can either be rejected and a new one is formulated, or more data is required to retest the hypothesis.
A1 Because water is a solvent, and as long as the material, in this case salt, has less density than the liquid itself, it should sink. But, other solutes like sugar, are denser and water, and will simply sink.
A2 Strictly, there are many many salts, and common table salt, NaCl is the one we meet most commonly. This dissolves readily in water as you remark.
Copper Sulphate 'bluestone' is another salt. Some salts are essentially insoluble, such as many of the Mercury salts - especially the Mercurous ones.
What happens to metal are heated and cooled?
It depends on the metal but often it will change phase and crystal form and have different properties. As an example steel when molten is in what is called the austenitic phase. This is a face Centered Cubic crystal structure. When quickly quenched it becomes martensitic which is brittle and Body Centered Tetragonal. Cooling down slowly will produce a pearlite structure.
If a liquid metal is poured into a mold it will take the shape of that mold and when cooled will keep the shape of that very mold. It will also contract/shrink.
When water boils in a pan on a hot burner how does heat get to the water?
The only way to 'place' water on a hot burner is when it is a solid (ice), or as a container of liquid water
Naturally, the hot burner would melt it into a liquid and rapidly boid it away into water vapor (gas)
How long does it take for an ice cube to melt at 78 degrees?
it depends upon the amount and the shape of the ice.
Step by step of how to do a science project?
1. Introduction = what is the project main idea or what is it a bout .
2. Hypothesis = a opinion or a believe
3. Materials = things that you use to make a project
4. Procedure -= the steps
5. Data collection = to collect in formation
6. Data analyze = collect the data and what did you get form all the data
7. Conclusion = the summarize
8. Questions
What characteristics must a hypothesis have to be useful in science?
capable of being proven false.
testable
Why do some solids sink and some solids float?
Anything heavier than water sinks; anything lighter than water floats.
Or, another way to say it: anything with a higher density than water (water weighs about a gram per cubic centimeter), or a higher specific gravity than water, sinks.
If the object weighs less than the weight of water that it displaces, then it floats.
What is the zooflagellate method of movement?
Flagellates have flagella, which are tails, that help them move. A flagellum is a bundled microtubule tail that propels them through liquid.
Why are the M and C terminals of a watt meter short circuited?
In a watt-meter there are four terminals:
M,L which are the current coils and
C,V which are called as pressure coils . .
To measure the current the measuring instrument should be placed in series with the load but in case of voltage, the instrument should be connected in parallel to the load . .
therefore M from the current coil and C from the pressure coil are can be short-circuited to measure the power of the given circuit.
by
hameed khan md, hyderabad
e-mail:hameed.shonnu@gmail.com
THANK u
Explain the difference between a hypothesis and a theory?
A very complicated question but to pare it down:
An hypothesis is a preliminary answer to a scientific question but is one which needs testing.
A theory is an hypothesis that has withstood numerous tests and has not failed.
Perfume is made up of alcohol, water and perfume oil (fragrance). Alcohol acts as a base that mixes the oil, and also acts as a volatile ingredient to help the perfume molecules evaporate and spread in the air. Perfume fragrances are particularly detectable by the human scent receptors, even in very minute concentrations.
The term bioethical describes questions about what people should do with knowledge in biology that cannot be answered using the scientific method. The scientific method is a method of procedure that consists of observation, measurement, and experiment.
Absolutely, the scientific method is the very backbone of experimenting and only through experimenting can scientists make discoveries. The scientific method is necessary to ensure validity, and reliability, without it we can't trust the results to be accurate or reliable.
What are the four problemsolving steps in the correct order?
1-Understand the problem
2-Gather your resources.
3-Come to an answer.
4-Check your answer and present the solution.
.
When you add so much solute that no more dissolves what do you have?
A saturated solution is made when you have added so much solute that no more dissolves. The amount of solute needed to make a saturated solution will change with the temperature of the solution.
