Anything that you can hear.
When you drop a rock and it hits the side walk it makes a sound. Kinetic energy transferred to sound energy.
Mechanical energy
Reflected
When an object is in motion, such as a falling pencil, it posseses energy, there fore something must absorb it's energy to stop it to a rest. (example- a car in motion stops by the brAke absorbing it's energy). But energy is never destroyed or created, it can only be transferred from one form to another (example- the cars brakes heat up when used because the cars energy is being transferred to heat energy). So, the instant the falling pencil strikes the ground, it stops falling correct? But the energy the previously falling pencil possess must be transferred to another form of energy the energy can't be "lost" right? So what happens is some of the energy is converted to heat when it strikes the ground, you may not believe it but there is heat when it hits the ground because of friction. Furthermore, some of the energy is also converted to sound energy. (the pencil makes a sound when it hits the ground and sound is energy) but the heat and the sound energy combined is not enough to transfer all of the energy of the falling pencil. So where does this little extra energy go? You guessed it! Back up! It hits the ground, it goes back up because not all of it is transferred to another form such as sound or heat so it must go back up- or as you said, bounces. Hope this helped you understand.
By electricity.By electricity.By electricity.By electricity.
an example of thermal energy being transformed into sound energy is the crackling of a fire
an example of thermal energy being transformed into sound energy is the crackling of a fire
Generally it is transferred into heat and sound while the object is being pushed.
With sound
sound is energy transferred by vibrations in a given material
When you drop a rock and it hits the side walk it makes a sound. Kinetic energy transferred to sound energy.
sound is energy transferred by vibrations in a given material
Hearing, music, telephones, and vacuums are examples of sound energy.
Perhaps the most general rule as regards the energy of sound is that it is mechanical energy, and for it to propagate, the energy must be transferred into the medium through which it is traveling. Speakers creating sound for entertainment transfer sound energy into the air, and it moves to a listener. A sonar (sound) signal is transferred into water to move out, impinge on objects in the water, and then return (the echo) to a transducer in a system to locate or image underwater objects. Compare this to outer space, which is a vacuum. Sound energy cannot travel there as there is no medium into which the energy can be transferred.
Sound
Energy can be transferred in many different ways; for instance, heat energy can be transferred by conduction, convection and radiation; energy can be transferred by electrical energy, or by sound, light, or by several other waves; a moving object (which has all sorts of types of energy) will change its position; etc.
Mechanical energy