A student has a syringe which has its open end sealed. The syringe is completely filled with a certain substance, as shown in diagram 1. The student pushes the piston of the syringe in as far as possible, as shown in diagram 2.
What is in the syringe?
a gas and a liquid
2 )
a solid and a liquid
3 )
a liquid only
4 )
a solid only
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