Answer:
Speed and direction affect pitch.
That's tin
d = m/v
42.5/ 5.8
which comes around 7.3 g/ml and matches with the density of the tin metal
Answer: sac
Tunicates are sea squirts that are found in the marine water. These animals remains attached to the rocks and the sea beds. They exhibit a body shape which looks like a barrel. The barrel has two openings called as siphons. These siphon helps in the intake of the food particles and oxygen. These animals look like sac on the sea floor.
The SI unit for frequency is Hertz (Hz), or simply, the reciprocal of a second. It measures how fast an object could be moving. In this case, the frequency would be 16 wave crests per 8 seconds (16/8 = 2). In simplified answer, the frequency is 2 per second, or 2 Hz.