14. This illustration shows the path that a ball follows when it is thrown into the air. The speed of the ball's motion changes after it is thrown. Which of these statements is TRUE about the energy of the ball, as it moves from point W to point X? A. Energy is created as the ball travels between point W and point X.
B. Chemical eneray of the ball increnses between point W and point X.
C. Gravitational potential energy is at its greatest as the ball reaches point X.
D. Potential energy is transformed into mechanical energy between point W and point X.

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

The sound level near a noisy air conditioner is 70 db. if two such units operate side by side, the sound level near the, would bea. 70dbb. 73 dbc. 105 dbd 140 db

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.