A cello string is 0.695 m long and
plays a 98.0 Hz note. What is the
speed of the waves in the string?
(Unit = m/s)

136.22

Explanation:The equation for velocity in these questions was explained in an the last unit and is: v=(2*L*f)/n

0.11 m/s and 0.28 m/s should be correct

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.