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Why the rubber bulb of the dropper must be pressed before the liquid rises to the dropper?
Wiki User
∙ 10y ago
It is the expansion of the rubber bulb which draws the liquid upward, and it cannot expand if it is not first squeezed. Air pressure pushes liquid up into an expanding bulb since the expansion of the bulb, with no access for air to enter, creates a partial vacuum.
Wiki User
∙ 10y ago
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What are hard surfaces?
A hard surface is one which does not yield when pressed. Wood, stone and glass are hard surfaces.... rubber, fabric and foam are soft surfaces.
Why does the rubber band stretch before it breaks?
Rubber bands stretch because of the latex in them and because they are elasticey.
How far can a rubber band be stretched before it breaks?
This depends on the size of the rubber band, the materials and impurities in the rubber band, and the speed at which you stretch it, as well as the conditions that the rubber band has been under.
What rubber band will shot farther a thick rubber band or a thin rubber band?
it probably depends on the length. First instict, I would say a thin one, but as I said before, it all depends
Why rubber suckers sticks on smooth surfaces?
The sucker is dish shaped, when pressed against a smooth surface the air is forced from beneath the sucker.The rubber makes an air tight seal and the air pressure outside is greater than the air pressure beneath the sucker, thus forcing the rubber sucker to 'stick'.
How do you use the dropper?
USE TO DROP SMALL LIQUID OBJECTS TO ESTIMATE THE mL OR GRAMS . THAT IS THE USE OF THE DROPPER ...............MABUHAY LAHAT ng LINHSIANS .............INHALE""""" TEACHER:OXYGEN kaba? STUDENT: ABA SYEMPRE
How does the ink dropper works?
ink dropper works on the principal of air pressure. when we fill ink inside the dropper we have to press it's bulb(upper,soft rubber portion),because of which the air inside the dropper is removed and low air pressure region is formed. when we dip it in the ink,the space is filled with ink,which remains retained in it unless we press the bulb again.
How does medicine enter in dropper?
It's commen sense actually,it's due to diff in air pressure by pressing it creates low pressure and outside is a gap higher pressure thus fluids movie from outside(high pressure to low pressure)to the inside of the dropper.
What a eye dropper?
A glass or plastic pipette with a rubber bulb that is used to drop medicines into the eye.
What Does A Science Dropper Look Like?
The main body of the dropper is made of glass. The glass tube is a few inches long and gets smaller at the bottom. The top of the tube has a rubber, balloon like top that is squeezable.
Can rubber stand the cold?
If you drop a piece of rubber in liquid nitrogen, (in a dewar, where the liquid nitrogen does not boil that fast), then the rubber will be frozen. In that sense, the rubber will get hard and brittle. If by 'freeze' you mean the formal definition, which is to form actual crystals, as water does when it freezes, then the rubber won't freeze. You should know that when you drop the rubber into the liquid, the liquid will boil off very quickly for a while even though it's in a dewar. That's because heat will flow straight from the rubber into the liquid.
How do you use an eyedropper?
you use an eyedropper by squeezing the top rubber and putting the tip of the eyedropper into liquid. then, you release the top rubber but still hold on and the liquid will come up and into the glass tube. to dispense liquids, squeeze the rubber until the liquid comes out of the tip of glass.
What is liquid rubber?
Somebody answer this or I'm gana flip!
What is a eye dropper?
A glass or plastic pipette with a rubber bulb that is used to drop medicines into the eye.
Why did the Aztecs put liquid rubber in their ears?
The Aztecs put liquid rubber in their ears to create earplugs. The rubber helped block out noise and protect their ears from water during activities like swimming or bathing. It also had ceremonial and symbolic significance in Aztec culture.
What is a poor conductor of electricity and can be a solid liquid or gas?
rubber
What is the foamy liquid with a strong smell of rubber that comes out of a squash ball when you break it while playing?
It is actually rubber.
