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Does plasticine block a funnel of water from going in to the bottle?
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∙ 13y ago
Yes
Wiki User
∙ 13y ago
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Why does a window left slightly open whistle on a windy day?
While there are a few ways to think about what sound is, for our purposes we will think of it as the rapid back and forth movement of a group of air molecules. What is happening in the case of the window is that the flow of air hitting an edge on the window is unstable. As you can imagine the fluid mechanics involved is quite complicated and quite frankly beyond me. However, the principle is the same as when you generate a sound by blowing on the top edge of an empty bottle. In that case what is happening is that part of the stream of air is quickly flipping back and forth between going over the lip of the bottle and going into the bottle. When it starts going over the lip of the bottle, forces are created the causes it to start going into the bottle. However when it starts going into the bottle, there are forces that are created that cause it to start going over the lip of the bottle. This happens over and over again very quickly. The forces that pull the air stream back and forth are called "negative feedback" forces. All wind instruments use the combination of air flow and negative feedback to generate their sounds. How quickly the flow moves back and forth depends on the dimensions of the cavity, the size of the column of air hitting the edge and the speed of the air flow.
Two solid blocks of identical size are submerged in water One block is lead and the other is aluminum Upon which is the buoyant force greater?
I would say the the lead displaces less water. Think about the sizes and densities. If you have a block of lead and a block of aluminum (weighing the same), common sense tells you, the lead block is going to be a lot smaller due to his great density. Therefore, smaller block displaces less water
Can you give me an experiment to calculate the coefficient of static and dynamic friction?
Get a block of known mass, a protractor and a board; the materials should be chosen as those for which you want to find the friction coefficients. Place the block on the board and gradually increase the angle of the board while keeping track of the angle the board makes with horizontal. The angle at which the block slips is crucial. The friction force opposes the movement of the block based on the normal force applied on the block by the board. As you increase the angle, the normal force decreases. F = uN where F is the friction force, N is the normal force and u is the coefficient of friction, in this case, static. Using the angle at which the block slips, calculate N; N = m sin(@) where m is the mass of the block, and @ is the measured angle. Now F must be equal to the force of gravity pulling on the block parallel to the board, otherwise the block would slip (and it does precisely at the measured angle) so; F = m cos(@) where m is the mass of the block and @ is the measured angle. Now that F and N are known, use the aforementioned relationship to calculate u. This value should be non-negative and has no units. As for dynamic friction; let the block slide from the top of the board when it is at a high angle and gradually decrease the angle until the block comes to a stop on the board due to friction. This should be done in trials of larger degrees until a working angle is found, then more precise trials can commence. When such an angle is found that any higher angle allows the block to keep going all the way to the bottom, the same calculations as above must be repeated to find the coefficient of dynamic friction.
Is bottle caps renewable or non renewable?
If anyone collects them and uses them again, that defines them as renewable. But I doubt it. Metal caps are distorted on opening, surely no one is going to straighten these out again?
I need a science experiment URGENTLY. I am in the eight grade and the project has to be a science experiment in which i may construct a graph for it and it MUST have an application or meaning?
BLOBS IN A BLOTTLE The World's Easiest Lava Lamp A clean 1 liter clear soda bottle 3/4 cup of water Vegetable Oil Fizzing tablets (such as Alka Seltzer) Food coloring 1. Pour the water into the bottle. 2. Use a measuring cup or funnel to slowly pour the vegetable oil into the bottle until it's almost full. You may have to wait a few minutes for the oil and water separate. 3. Add 10 drops of food coloring to the bottle (we like red, but any color will look great.) The drops will pass through the oil and then mix with the water below. 4. Break a seltzer tablet in half and drop the half tablet into the bottle. Watch it sink to the bottom and let the blobby greatness begin! 5. To keep the effect going, just add another tablet piece. For a true lava lamp effect, shine a flashlight through the bottom of the bottle. To begin, the oil stays above the water because the oil is lighter than the water or, more specifically, less dense than water. The oil and water do not mix because of something called "intermolecular polarity." That term is fun to bring up in dinner conversation. Molecular polarity basically means that water molecules are attracted to other water molecules. They get along fine, and can loosely bond together (drops.) This is similar to magnets that are attracted to each other. Oil molecules are attracted to other oil molecules, they get along fine as well. But the structures of the two molecules do not allow them to bond together. Of course, there's a lot more fancy scientific language to describe density and molecular polarity, but maybe now you'll at least look at that vinegrette salad dessing in a whole new way. When you added the tablet piece, it sank to the bottom and started dissolving and creating a gas. As the gas bubbles rose, they took some of the colored water with them. When the blob of water reached the top, the gas escaped and down went the water. Cool, huh? By the way, you can store your "Blobs In A Bottle" with the cap on, and then anytime you want to bring it back to life, just add another tablet piece. The project above is a DEMONSTRATION. To make it a true experiment, you can try to answer these questions: 1. Does the temperature of the water affect the reaction? 2. Does the size of the bottle affect how many blobs are produced? 3. Does the effect still work if the cap is put on the bottle? 4. Does the size of the tablet pieces affect the number of blobs created?
How do you pee in the car?
If you are going to try this, practice in a shower stall first: # Cut the top off of a water bottle so it makes a funnel (be sure to take the cap off). # Turn the funnel upside down and insert it into the bottom part of the bottle. # Crouch on the bottle and let loose. # Dispose of it properly. This worked fairly well for at least a few of our female soldiers...nobody got shot at for taking an unscheduled pit stop.
How does a blacksmith make metal objects?
As you use your hands to make an object of Plasticine a blacksmith uses a hammer to shape the hot metal. As a blacksmith to test how I am going to forge something i will sometimes use a piece of Plasticine and use my hammer to shape it. Surprising enough hot metal and plasticine act very similar.
How many straws would you need if you used whole straws for the side edges and quarter straws for the base edges?
That's going to depend on what shape you're building, which, as far as I can see, you neglected to mention.
Which part of your ear acts like a funnel?
your ear is like a funnel by when you look at your ear it is big but going into the ear it gets smaller and smaller.
What are funnel webs?
Funnel webs have a conical shape with a wider and a narrower opening at the two ends that are mostly made by funnel webs spiders. The web itself would look like a small tunnel going to the spider's nest. Its opening would mostly have a funnel-like shape. Be very careful as you approach a funnel web spider as they have a large number of different toxins in the venom and are potentially deadly.
What websites tell you about the life of Pippa Funnel?
Try going to the Ubisoft Petz portal and going to the Pippa Funell website it has lots of info.
If you put a cork into the neck of a bottle filled with airwhat happens to the pressure inside the bottle?
The cork over the bottle's neck is going too be pushed by how much air is in the bottle.
Where do you put transmission fluid on 1990 cougar?
You are going to need a long funnel as it goes into where you pull the dipstick for the transmission fluid out
What are you going to do in the event that the cork breaks or falls in the bottle?
Cry.
Why is water going from radiator into overflow bottle?
Engine is overheating.
Can you have your medications in your purse?
Yes you can. You should have it in the bottle, it was prescribed for. Controlled substances really need to be in their bottle, if you are going to carry it, in your purse.
How To Block Facebook Messages Coming Into What if your Email?
Just go to your settings and block the messages from going to the email
