Electromagnetic and mechanical waves have different characteristics that make them advantageous for certain applications. select the reasons that mechanical waves, such as ultrasound, are used for soft tissue imaging and to identify fractures in metals. i) mechanical waves are less likely to damage materials than most electromagnetic waves. ii) mechanical waves have more energy than electromagnetic waves iii) mechanical waves can transmit results more rapidly than electromagnetic waves iv) mechanical waves generate vibrations that are sensitive to changes in temperature and density a) i and iv b) i and iii c) ii and iv d) ii and iii

The answer is A I and IV

The correct answer is A,  I and IV

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.