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Radius(air) = 3
. Circumference(air) = 1
That's the area.
The prism is a three dimensional object. 3-D objects do not just have area. They have something call surface area, which is the amount of around on the surface of the object. 3-D objects also have volume. Volume is the amount of space inside the object. You can not work out the surface area of volume of just a prism. There are many many prisms out there. Prisms have many shapes and sizes.
Now that depends on if you mean outside surface area. A cone has an inside surface area too. Just adding my two cents. Not even good at math. But I can debate a point til the death!
Area(air) = 2
Area(air) = 2
Radius(air) = 3
. Circumference(air) = 1
Yes.
The heat from the lighter, when placed on the surface of the stretched surface of the balloon,would melt the plastic of the balloon and allow the air inside the balloon to escape, so deflating the balloon.
Pressure inside of a balloon is created by the movement of the air molecules against the inner surface of the balloon. The more air inside the balloon, the more molecules that are hitting the same surface are, so there is more pressure.
Yes it does, it also depends on how big the are inside the balloon is too. because think of a chinese lantern, as this floats to the sky using the hot gas from the fire, now think of a hot air balloon in the same way :)
Because air planes are kept in the air by the way air flows around and against their surfaces while a balloon is kept in the air by the air inside the balloon is lighter than the air outside it. Basically a balloon is floating in air. And a roundish shape is what allows the biggest volume inside for the least amount of surface area, meaning that you get the most lift from the least amount of cloth.
the resistance of the inside layer silver is good the amount of radiating surface bigger is better
Inside the balloon with no water at all, the intense heat from the hot fire will melt the surface of the balloon. The pressure inside the balloon is so big that the balloon deflate and POP! With water, the water conducts the fire away from the balloon so the suface may not reach high tempertures. The balloon is remained inflated.
Air is transferred from your lungs into the balloon, where it diffuses inside the balloon and due to the elastic tendancies causes it to expand from the pressure of the increasing amount of air you blow in.