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How Large Is That Helium Balloon? A balloon is carrying two people in a basket. The total mass of the people, the basket, and the material of the balloon, but excluding the mass of helium gas, is 280 kg. What volume of helium is needed to lift the balloon (Figure 12-30)? The density of the helium is 0.18 kgym3, and the density of the air is 1.30 kg/m3.
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Nuclear chemistry
How is nuclear chemistry different than other types of chemistry?
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Nuclear chemistry
What is an Isotope?
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Nuclear chemistry
Do electrons, protons, and neutrons all have the same mass?
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Nuclear chemistry
Are all isotopes stable?
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Nuclear chemistry
What is an antiparticle, and what is antimatter?
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Nuclear chemistry
What is a positron?
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Nuclear chemistry
What are particle accelerators used for?
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Nuclear chemistry
