Convert 2.4 milimetre into metre​

Explain the consequences of this addiction to the brain tissue

Does the distance travelled by an oscillating mass between times t=0 and t2 equal the displacement of the particle over the same time period if t2> t/2? hint: consider a sine wave starting at t1=0, then consider a closing wave starting at t1=0, for your explanation.

How do the forces acting on a boat compare to the force acting on a plane ?