Pluto: Group of answer choices has no moons has a nearly circular orbit around the Sun, due to its interactions with other objects in its vicinity is massive enough to substantially affect the orbit of Uranus, which led to its discovery has a density intermediate between that of the terrestrial and Jovian planets is about as large as the planet Mercury

sonar - device which is used to find the submit submarines, sankalp ship. sonar waves consists of a transmitter and detector which are installed in the observation centre on board of a ship. the ultrasonic waves are sent into the sea at high frequency about 1000 khz in all direction.

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.