Why is it easier to perform the skating on the snow?

When is it easier to press the syringe with water or air ?

Easiest to perform in the following is

Define snow

Why is it easier for you to float in salt water than in fresh water ?

Why is it easier to balance a bicycle in motion ?

Why is it easier to stop a lightly loaded truck than heavier one that has equal speed ?

Which reagent is best to perform the following transformation?

I can perform three types of respiration. I can perform respiration through skin, lungs and bucco - pharyngeal cavity . Who am I ?