Answer:
If you imagine thhat you will repeat the experiment in an airleas tube or a vacuum is that if you repeat the experiment with the airleas tube that you will noot be able to use more air to blow or add air to your experiment but if you use a vacuum you can keep reusing the air because the filters in the vacum produces clean air.
Explanation: I am not sure this is the answer is what you were looking for. If this is Wrong im sorry.
