Question

Haven't you seen an injection needle fixed at the top of a drip bottle when a drip is administered to patients in hospitals? Why?
[2 marks]

Answer 1

Fluids naturally flow from higher pressure to lower pressure. (1 mark)

If an injection needle is not fixed at the top of the drip bottle,
the medicine will not flow into the patient's body because the pressure inside the drip bottle is less than that of the atmospheric pressure. (1 mark)