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Give three examples where air is pumped in and out to change density?
In the process of inflating a balloon, air is pumped in to increase the density of the balloon. In scuba diving, a diver adjusts the air in their buoyancy control device to control their density and buoyancy in the water. Air is pumped into a hot air balloon to increase its density and provide lift for flight.
What happens to hydrogen when it is in a balloon?
The hydrogen in a sealed rubber party balloon is compressed slightly by the balloon rubber. So its density decreases a little, its pressure increases, and its temperature increases. But the temperature soon returns to the ambient temperature as heat is lost through the balloon wall. Also, the hydrogen will not stay in the balloon for long because it will leak out through pores in the rubber.
Does the amount of water effect its density?
The only way to change the mass of water would be to either add more of it (which wouldn't change it's density - density is an intensive property, not extensive) or to change the isotopes of hydrogen and oxygen in the water - thus getting "heavy water" such as is present as an intermediate materiel in the refining of tritium and as a moderator in some nuclear reactors.
What is the density of an average cat in cm3?
The density of an average cat is around 1.0-1.1 g/cm3.
Is the density of 8ml of water the same as the density of 4ml of water?
yes. the density of a element will not change only the mass and volume will.
What is the density of balloon?
Density of any balloon depends on the material of the balloon and how much the balloon is filled.
Volume and pressure are held constant why does the hot air balloon rise and fall?
Although volume and pressure are held constant, some of the gas escapes from the bottom of the balloon, thus decreasing the mass of the gas in the balloon. If mass is decreased, then density is also decreased because density=mass/volume. Such a decrease in density of the balloon causes it rise.
Can you change an objects density?
Yes, an object's density can be changed by altering its mass or volume. Increasing the mass while keeping the volume constant will increase the density, while decreasing the volume while keeping the mass constant will also increase density.
What happens to the balloon as it rises?
Baloon filled with hydrogen gas float in air or rises if the quntity of gas it contain is adjusted so that the average density of the balloon is just eguall to the density of the surrounding air.The weight of the displaces air is then eguall to the weight of the balloon
Why hot air balloons rises up in the sky?
Hot air has density less than the air surrounding the balloon. When the average density of the balloon filled with hot air is less than the density of the air outside upthrust is more than the weight of the balloon. therefore it keeps on rising up till the upthrust becomes equal to the weight of the balloon.
How do submarines float with heavy metal?
They have ballast tanks that can be filled with air for buoyancy.Answer:Floating or sinking in water is related to the density of the entire enclosed volume of the submarine. Obviously if the metal in a submarine were compressed into a ball it would sink as its density would exceed the density of water. However the average density of a submarine (metal skin, interior equipment and air) is less than that of water and it floats. To dive the air in the ballast tanks is compressed or allowed to escape increasing the average density and it sinks. Replacing the air in the same tanks decreases the density and it floats once more.This is somewhat like a hot air balloon. The material in the balloon would not float in the air, however once the balloon is filled with hot air, the average density decreases and the balloon rises.
What happens if the volume of the air inside balloon increases while the mass of the air stays the same?
If the volume of the air inside a balloon increases while the mass remains constant, the density of the air inside the balloon will decrease. This means that the air inside the balloon will become less dense.
What gas put in a balloon would make it fall?
Any gas that is more dense than air.Answer:It is a bit more complex than that - an air filled balloon would still fall because air has the density of air. In a normal inflated balloon the air in the balloon is compressed and has a density more than uncompressed air. If the "balloon" were a plastic bag wiith no air pressure above the pressure of the surrounding air, the balloon would still fall as the combined (average) density of the balloon/bag system is greater than the surrounding air. Even if the balloon were filled with a gas with a lower specific gravity than air the balloon wll fall if the compressed gas density excedes that of the surrounding air or if the combined (average) density of the balloon/bag or balloon system is greater than the surrounding air.
If you increase an objects mass but not its volume what have you changed?
You have changed the object's density by increasing its mass without changing its volume. Density is calculated by dividing mass by volume, so as mass increases while volume remains constant, the density of the object will also increase.
How is density related to the flight of a hot air balloon?
Density is inversely related to the flight of a hot air balloon. As the density of the air inside the balloon decreases, it becomes less dense than the surrounding air, causing the balloon to rise. This is because the buoyant force on the balloon is greater than its weight.
When you put a balloon in a cold room then in a worm room does its density change?
No. The volume of the helium will change as it expands the balloon due to the increase in temperature. The density of an element never changes. The reason for that is because density is just a fancy way of saying 'The atoms are this far apart' in the equation mass/volume = density.
Explain in terms of density and Charles's law why heating the air allows a hot-air balloon to float?
Heating the air inside the balloon decreases its density due to Charles's law, which states that as temperature increases, volume increases assuming pressure is constant. The lighter, less dense air inside the balloon creates a buoyant force greater than its weight, allowing it to float in the denser, cooler air outside the balloon.
