Because it is a large object and when the light hits it all the colors are absorbed except blue is reflect same thing with the ocean.
Answer:
(a) Frequency will be 0.168 Hz
(b) Frequency will be 0.0789 Hz
Explanation:
(a) We have given velocity of the ocean waves in east direction v = 3.2 m /sec
Distance between the crest 
We know that 
So 

(b)Velocity of the ocean waves in westward direction v = 1.5 m /sec
Distance between the crest 
We know that 
So 

The closest answer is
Alpha - mass of 4 and charge of +2; beta - no mass and charge of -1; gamma - no mass and no charge (consists of energy)
It’s not exactly correct because a beta particle has the (small) mass of an electron (also the positron). All other choices are way off, I’d go with this one.
2.8 kg .............is the mass of a 1.2 N book.