What is the difference between the speed of an object the velocity of an object and the acceleration of an object

Which statement describes james chadwick’s discovery.

What conclusion can you draw from this experiment about the components of the black ink?

What do electromagnetic waves carry? how are they produced through which media can they move? where do they transfer energy? what do they not transfer? what do mechanical waves carry? how are they produced? through which media can they move? where do they transfer energy? what do they not transfer?