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Pumice is a type of extrusive igneous rock, formed from high silica lava which is explosively erupted from volcanoes. If the amount of trapped gases in the lava is high, vesicular pumice will be formed; thin walled, high in trapped gas pockets, and able to float on water.
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∙ 6y ago
Wiki User
∙ 11y agoIt is basically lava which has been infused with oxygen to form a light, porous rock when cooled, which will float. Think of bubbles in the bath tub converted into rock encapsulating the air pockets.
Wiki User
∙ 10y agoPumice is a lightweight volcanic rock filled with holes. It has a low enough density that it floats in water. Pumice is technically a form of volcanic glass. Explosive volnic eruptions are driven by the expansion of gasses trapped in the magma. Pumice forms from globs of foamy lava ejected into the air. These globs coo and harden rapidly, now allowing any crystals to form, and keeping the gas bubbles in place.
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∙ 14y agoIt is formed by highly silicious lavas errupting from volcanos. The gases in the rock exolve (come out of solution) and are trapped by the thick lava. This creates all the pores in the rock.
Wiki User
∙ 13y agopumice is floating rock.
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How it is possible for a rock to float in water?
if it is pummice (volcanic rock) yes.
What are the sequence of events leading to a volcanic eruption-?
During a volcanic eruption, magma moves in an upward direction towards the vent of a volcano. The type of eruption depends on the amount of silica and gas. After the eruption, magma touches the earth's surface and is classified as lava. Rocks and other debris in the volcano are forcefully pushed into the air. The rocks are called pyroclastic rocks. When the rocks touch earth, it turns into ash, dust, pummice or cinder.
Does Great Britain have any volcanoes in its country?
There used to be volcanoes in England, somewhat up to 300 million years ago, but there aren't any active volcanoes in England anymore. There is evidence of there being volcanoes in the Pennines mountain range, due to being based on a collision plate boundary at the time of its formation and the igneous rock generally found over the areas such as basalt, granite and pummice.
How it is possible for a rock to float in water?
if it is pummice (volcanic rock) yes.
Does a pumice rock have a reaction with vinegar?
Nothing. Pummice is insoluble in weak acids.
What are the sequence of events leading to a volcanic eruption-?
During a volcanic eruption, magma moves in an upward direction towards the vent of a volcano. The type of eruption depends on the amount of silica and gas. After the eruption, magma touches the earth's surface and is classified as lava. Rocks and other debris in the volcano are forcefully pushed into the air. The rocks are called pyroclastic rocks. When the rocks touch earth, it turns into ash, dust, pummice or cinder.
Which is heavier Water or rocks?
To be more specific than the previous answer, kilogram is a unit of mass. Weight is related to mass by Newton's second law of motion, which relates to us that force (weight) is equal to mass times acceleration (gravity). Provided that the objects in question are weighed at the same location, their weights will be identical, as a) their mass is the same and b) their acceleration is the same, and so the equation F = M x A (force equals mass times acceleration) indicates that the force (weights) are the same.
Does Great Britain have any volcanoes in its country?
There used to be volcanoes in England, somewhat up to 300 million years ago, but there aren't any active volcanoes in England anymore. There is evidence of there being volcanoes in the Pennines mountain range, due to being based on a collision plate boundary at the time of its formation and the igneous rock generally found over the areas such as basalt, granite and pummice.
How do you get rid of warts easily?
There are many ways to remove warts. However for some wonderfully strange reason, it is the cheapest, most painless, quickest, and least destructive method that works best. I've had them frozen (ineffective and painful), cauterized (effective but very painful and very destructive, long healing time), and surgically removed (moderately effective and painful, and long healing), used acids (painful, ineffective, timely), and even herpes medications (embarassing, timely, messy) but the best treatment is actually something you can do at home. It sounds too good to be true, but after trying to solve my plantar wart problem for ten years, I got desperate, and to my complete surprise, this works wonderfully. And it's pretty much free. Things you'll need: sandpaper, pummice or scalpel, duct tape, and a banana. Steps: 1. Peel banana, then eat it (eating is optional), save peel. 2. Look at your wart, if it is heavily callused, try to cut or sand the skin down a bit (if it starts bleeding, that is plenty). 3. Cut a square of banana peel that is a little larger than the surface area of your wart. 4. Place the peel directly on wart and cover liberally with duct tape (use plenty of tape, and place the peel inside side to the skin). 5. Leave on overnight, or as long as it stays on. 6. The wart should begin to turn white so you'll see it better. 7. Depending on the size/deepness, keep sanding it down or slicing off the dead skin, and reapplying the peel/tape daily or as needed. 8. Eventually (for small warts it could be as little as a few days, larger ones might take weeks) you'll go to scrape off the dead skin and find no warty tissue left, only healthy pink stuff. I usually do the peel/tape for one more day after this point just to be sure. 9. Enjoy and take care of your newly wart-free pain-free skin! It's ridiculous how well this has worked for me and how all the other methods have been expensive and failed. Hope it helps!
What did scribes do?
There was no such thing as "free time" in Ancient Egypt. You did your job from sunrise to sunset, excluding meals, and you slept from sunset to sunrise.
How do you replace the water pump on a Nissan Maxima?
Water Pump ReplacementThis is a How To on how to replace the water pump in a 3rd generation Maxima with the VG30E engine. (89-94 GXE and 89-91 SE models only) The VE's may be similar but I am not sure since I do not have one.Tools needed:jack STANDSjackstire removal toolsflathead screwdriver8, 10, 12, and 14 mm sockets1/4" and 3/8" drive socket wrenchesImpact wrench with a 27 mm socket(if impact wrench is not available you can use a socket wrench but you'll need a long tube for more leverage and something to hold the pulley still, like a rubber wrapped steel cable wound around the pulley a couple times then fastened to the frame of the car)Air compressor (if above available)HammerRubber malletLarge sized 2 or 3 jaw puller. Autozone OEM part number 27078Items needed:Water pump (of course)gasket (if not supplied with the pump)gasket sealer/compoundWD-40 (just incase you have to take off the lower plastic coverings)water (for you)anti-freeze with a 50/50 mix, or 70/30. whichever you prefer and whichever the bottle says to do. 70/30 is good in the winter but just do 50/50 cause it's easierGoJo with pummice (you'll get very dirty but you can use others)Removal:1. Unplug the negative wire from the battery terminal.2. Drain all of the anti-freeze, if newer get a container and keep it for re-use.3. Raise the car up off of the ground and secure with jack stands.4. Take the front right wheel off.5. Take the plastic cover that exposes the engine 10mm6. Take the bottom plastic coverings of the car. 10mm(BE CAREFUL with these screws. They get very rusted and break easily. I recommend using WD-40 A LOT and tightening and loosening those bolts until they come out all of the way. The work on doing that is better than having to drill out broken bolts later on)7. Remove the hose from the radiator to the splitter thingy. There is a metal piece holding the hose on. Take a 12mm socket and take the piece off. should be under the distributer. 12mm bolt and 2 flathead s/d bolts8. Remove the other hose that goes from the splitter thingy to the thingy right below it (right to the top left of the water pump) 2 flathead screwdriver boltsNote: you may need the screwdriver to pry off the tubing cause it gets kind of stuck on there. just work the screwdriver around the tube.9. Take off the top cam gear cover. 8mm bolts10. Unbolt but do not take off the water pump pulley. 4 10mm bolts11. There is a tensioner to the rear of the main pulley. Get out a 14mm socket and loosen (not take off) the tensioner pulley. Then, with a 12mm socket you will turn the bolt on the bottom clockwise (tighten) this will actually loosen up the belt. Get it loose enough where the belt slips over the water pump pulley easily. Now you can take off the water pump pulley12. While you are down there loosen the bolt on the top of the alternator and on the bottom, then turn the tensioner bolt counter-clockwise (loose). Then take the belt off. 12mm all13. Go back to the top of the car and there is another belt. The tensioner puller is right to the rear of the a/c. Loosen the pulley bolt then turn the tensioner bolt counter-clockwise. Get it loose enough to pull the belt off.14. Pull the belt off.15. Remove the a/c belt tensioner completely off of the car by removing the 2 12mm bolts located on the rear and the bottom of the tensioner and the 14mm bolt located on the front of the tensioner.16. Get out the Impact wrench with the 27mm socket and take off the bolt on the main pulley.17. Get the 2 or 3 jaw puller and set it up on the pulley. If you've never taken the pulley off before once you get the puller set up you might need to use a hammer and hit the bolt that tightens the puller to kind of knock loose the pulley. Tighten the puller until the pulley is almost off. Pull the pulley off with your hands because you don't want this 8.35 pound piece of metal to hit the ground and bend or scar.18. Remove the bottom cam gear cover. 5 8mm bolts19. Now you have full access to your water pump. Get the 12mm socket and socket wrench out and remove the 6 bolts holding the pump in. Notice there is a different bolt on the top front of the pump. It has a threaded end. Make sure that goes back into the same spot. 6 12mm20. MOVE BACK and pull of the pump. Some anti-freeze is sure to come out (cause it did on mine and if you read my story you know i had none)Installation:1. Get the new pump and clean the surface then put some gasket compound on the pump then put the gasket on the pump. Clean the engine where the pump goes. Add some more gasket compound to the top of the gasket. Kind of clean up the inside of the pump if any compound got in there.2. Carefully manuever (sp?) the pump into the correct spot without hitting anything to dirty up the gasket and put a bolt or two in there.3. Put the bottom cam gear cover back on. 5 8mm bolts.4. Put the top cam gear cover on. x(?) 8mm bolts5. This is out of step if you reverse it but makes life a little easier. Get the water pump pulley and kind of put it on the pump (it won't fit right on cause it's going to be a little snug) Line up the bolt holes and finger tighten one in there. Spin the pump around and put a bolt in the oposite side of the one you put in. Now put in the reset of the bolts. Get the shorter of the 3 belts and put it over the water pump pulley. Hold the belt down as hard as you can and start tightening the bolts on the pump pulley. Just do a cross pattern i.e. do one, then go right across to then next, then do the one beside, then go across (i hope you understand what I'm saying) Do this until the bolts are all of the way in and the pulley is on the pump all of the way. When you get all of the belts back on try to tighten all of the bolts again just to make sure. There is more tension so it won't move this time making it easier to get the bolts tightened all of the way.6. Put the main pulley back on and hit it as far in as you can with a rubber mallet.7. Put the main pulley bolt in and tighten it with the impact wrench. 27mm bolt8. now just put on the plastic pieces and the tubes and you are set.
