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Science Experiments
Experiments often conducted by students to test different scientific theories and hypotheses
11,111 Questions
What is dependent variables in science?
Science Answer: The Dependent Variable is the Variable that changes automatically during the experiment when the Independent Variable is changed by somebody. :D
What are the variables in the scientific investigation?
They're the parameters that vary. Hence the name.
Why are several trials taken for each measurement in an experiment?
A good way to reduce error or increase measurement accuracy is to take several measurements and compute their average. In other words, you achieve accuracy through averaging. (This also validates the repeatability of the measurement.)
Is pounds an independent variable?
Pounds is a unit. Amount of pounds sold could be an independent variable (and money made being the dependent variable). On the other hand, amount of pounds sold could be the dependent variable, and time could be the dependent variable. Pounds is just a unit.
Determination of young modulus using the cantilever experiment?
we can determine YOUNG MODULUS by using the equation,
w2=Exy3/4ml3 Where,x-is the width of the ruler
y-is thethickness of the ruler
m-mass
E-young modulus of the ruler
l-length of the ruler
w-angular frequency
Why is it important to have a constant in an experiment?
In order for the results to be valid, the dependent variable can only be affected by the independent variable, so somethings need to be kept CONSTANT. The things that need to be kept constant are called CONTROLLED VARIABLES. Even if controlled variables are affecting the dependent variable(s), which they usually do, keeping them constant will ensure that all trials of an investigation were equally impacted by the controlled variables, therefore allowing one to see the impact of an independent variable on the dependent variable.
All in all, a 'constant' in a science experiment should actually be called a 'controlled variable' and the description of such a variable is described in the third point. Hope this clarifies.
Who discovered zero point energy?
Well, the simple answer is we didn't. The more complicated answer involves, if you want to believe these kinds of things, extraterrestrial technology. It's hard to provide evidence on something your government doesn't, at all costs, regard at true for some strange reason. But evidence for this claim ofnon-human technologies "leaking" into the corporate sector can be found and many places if you know where to look. For example, one company which receives a great deal of money from both the U.S. military and NASA is the Analex company. And I don't know if they changed this on their site for obvious reasons or not, but much of the company's doings are in "retro-engineering". One must ask themselves, what would a company in the world's technological super power, let along one funded by NASA, ever find themselves with the need to retro-engineer technology, presumably being the foremost in technology?
It wouldn't be worth mentioning if it was a singular case, but...
Sadly, you can find companies like this all over, typically concerning military, aeronautics, or advanced medicine and computing, ect... It's great that the technology is springing up, its sad that few people are bringing the technology's origin to public attention however. Chances are, as with all technology, we just *need* to misuse it for a little while first.
How should you hold a tripod so as not to burn yourself?
If you are using the equipment correctly, the tripod should not be getting too hot. Once you are finished with the other equipment, take the gauze mat (which you should have been using) off with a pair of tongs. The tripod should be cool enough for you to pick it up by holding the bottom of two legs without burning yourself. Remember: don't move the tripod with anything still resting on it or a burner still going. Turn the burner off, remove the pieces on the tripod/gauze with appropriate safety gear, then move the tripod.
What country does the word Tripod come from?
The word tripod is probably derived from Greek: from tri for "three" and podos for "foot." Thus the word tripod means literally three footed.
Tripods have only three legs because even on an uneven surface something having only three legs will still not wobble, as something with four legs would. Most camera tripods have legs which are adjustable in length to make a strong, level camera platform.
What does SOC stand for in SOC broth?
It stands for 'Super Optimal Broth' for SOB media. The C stands for "catabolite-repression" which indicates that glucose has been added to the media. SOB is just SOC media with that addition.
How would you separate a mixture of salt gravel and power?
Salt is soluble in water; gravel is separated by filtering the solution or by decantation.
Power is not a material.
Salt water hot tubs have some misconceptions behind them. FIRST. It is not the same as the ocean. The ocean has tens of thousands PPM of sodium. (notice I used sodium, not salt) Salt water hot tubs (and pools) start out with only 1500 to 2100 PPM of sodium. A fraction. SECOND. All bromine and Chlorine start out as sodium. Bromine, started out as Sodium Bromide (NaBr). Chlorine (NaCl)......take a look at the box of table salt. Salt water hot tubs are nor corrosive then any other tub out there. Acidity actually come from other sources. Okay, now that we understand what and where the chemistry comes from, lets look into how it works for our hot tubs. We cannot use NaCl in a hot tub, it is affected by temperatures over 98deg. (which is every hot tub out there). So, we have to use a bromine base, that is not affected by heat, NaBr. This is of course the raw material used to make an active bromine, which is what kills the bacteria. We add, based on the size of tub, many gallons (or Litres) to the tub to bring the PPM up to the appropriate level. (between 1500-2100 PPM). The NaBr, is mixed up with the water and is now ready to turn into Bromine. We turn the NaBr into Bromine by passing the water proper ppm levels) over something called a "salt cell". This cell is made of graphite. (pools use titanium) As the water comes in contact with the surface area of the cell, the energy releases the Bromine molecule and turns the sodium molecule dormant (but not gone). We now have an active, or FREE BROMINE. As the bromine comes in contact with bacteria, the bromine is then used up, and goes dormant, bringing it back to its original state (NaBr). As your hot tub circulates, it simply recycles the inactive back to active, over and over again. And because Na is a mineral, it does not evaporate with your water, so there is far less draining of your tub, and considerably less chemicals....There is a major cost savings. P.S. If someone tells you that it is not good for your tub, understand this. The reason for dumping a regular hot tub every 3 months or so, is because of the pucks and powders that you use in the tub, they are full of all sorts of fillers and the pucks are full of glues and binders that help make them dissolve slowly. FACT. Salt water hot tubs do not use pucks and powders.... It actually far better for your tub, they use only liquids.
How do you separate salt and water after the salt is dissolved?
You can separate salt and water by evaporating the water. Heat the saltwater solution until all the water evaporates, leaving behind the salt. Alternatively, you can use a process called distillation to boil the water, collect the steam, and then condense it back into liquid water, leaving the salt behind.
What is the process for which scientists grade another scientist work before it can be published?
The general term for this is not "grading" but "peer review."
What are facts about hornblende rocks?
rocks such as inca, talc ,and hornblende are rocks that are found in the same places such as Louisiana,Canada,NewOrleans,Mexico,and also NewJersey alot of these types of rocks common uses is for making coal and to protect they also color dye these rocks and they form them into pennies,quarters,dimes,and nickels.Alot of people dont like to use these rocks but they are really worth something.Have you ever heard of a shitstone these rocks makes shitstones.also by the way kids or adults a shitstone is a type of rock that is created by the earths crust and soil and all kinds of minerals you need to know about 3 diffrent rocks igneous,sedimentary,and metamorphic rocks.Okay lets move on this is what i want to call the special rock in the world it is a gold rock that everyone in Russia is tring to find it is under the water and over the sea alot of people die during this activity.
What elements are rare within the solar system?
comet
eclipse{solar and lunar}
oxygen gas
water
revolvement of planets
Will mineral oil catch on fire if a lit floating candle is placed on top of the mineral oil?
yes it can
Can shredded paper be recycled back to the palm material?
No paper can only be recycled back to paper and not to the palm material back.
Why gather data during an experiment?
Gathering data is essential to any experiment. The data helps you comes up with results from your experiment so you can analyze them later for future studies. Without them, there would have been no point doing the experiment to begin with.
What does a hydroelectric power station look like?
Typically, hydroelectric power station appears to be a dam holding back a reservoir of water. Inside are turbines that turn the water to steam to produce electricity.
