When your standing in a subway train and the train suddenly stops but your body continues to move forward what newton law is it

Newton's first law. Inertia.

If it's moving, it tends to keep moving.

"Stopped" tends to stay put

that is Newton’s first law!

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid