What are the different types of motion that you would observe in a pendulum clock?

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

Which is not true about oxygen-17 and oxygen-18?

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy