A water wave of frequency 20hz has a velocity Of 24ms¹ it enters the shallow region at an angle of incident of 45 and speed recluces to 18ms² calculate (A) Refractive index (b)Angle of refraction (c) wave length of water wave in the shallow region. .

i believe the answer is a

choosing tennis and golf balls is your inde choice.

their mass and volume are dep

current flows in a wire

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.