If you filled a flat car tire with lots of dry ice and screwed the cap tightly on the valve stem what will happen over time?
a. the tire will begin to inflate.
b. the tire will get really cold but the dry ice would stay as a solid.
c. the tire will inflate for a while and then the vapor would re-form into dry ice.
d. there will be no effect on the tire at all since the dry ice is not the same as air.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.