Consider that the room is a closed system. ryan uses the chemical energy in his muscles to create the energy of motion. he uses this energy of motion to pull the string on the clapper of a bell to produce a sound. sound fills the room.

which describes the energy in this room?

a. while energy has taken different forms, total energy remains the same.

b. as energy changes forms, total energy decreases.

c. while energy is changing forms, total energy at first increases, then decreases.

d. as energy changes forms, total energy increases.

"energy cannot be created or destroyed"...yet. Until we can create energy itself, the answer is

A. While energy has taken different forms, total energy remains the same.

source: Albert Einstein

answer

crater lake was formed when mount mazama produced a large eruption and collapsed to form a caldera, which then filled with water forming a lake.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.