The pirate ship tie at the amusement park is a giant pendulum that riders sit in. it swings back and forth, with a maximum velocity of 20 m/s. if the combined mass of the ride and the passengers is 8000 kg, what is the maximum height of the boat?

Here as we know that there is no loss of energy

so we can say that maximum kinetic energy will become gravitational potential energy at its maximum height

So here we have

here we have

v = 20 m/s

m = 8000 kg

now from above equation we have

so maximum height is 20.4 m

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.