A lot of things happen when an object bounces. Some of the objects energy, or momentum, goes into the floor which causes the surrounding floor to warm up slightly. Also, there is inefficiency that will cause the ball to eventually stop bouncing.
Also, hearing the ball hit the floor means that energy went into the surrounding air molecules, causing them to heat up slightly as well as allowing you to hear the ball hit the floor. All of this causes energy to be lost in the bouncing.
the gravitational pull of the earth makes the ball come down ,and the elastic makes it come back up.
http://youtu.be/dT5S52cGr58 According to this yes they do.
because some of the energy that helps the ball to bounce is absorbed into the surface it is bouncing on (because the ball can be squashed) and so the energy deflected back up into the air again is less and less each time it bounces.
no
Bouncing can tear muscle fibers
Potential energy to Kinetic energy
heat energy
because some of the energy that helps the ball to bounce is absorbed into the surface it is bouncing on (because the ball can be squashed) and so the energy deflected back up into the air again is less and less each time it bounces.
Heat.
no
Energy is lost as heat during respiration.
Bouncing can tear muscle fibers
Bouncing can tear muscle fibers
Kinetic or potential energy are always present during energy transfers.
It's lost as thermal heat to surroundings.
Potential energy to Kinetic energy
heat energy
Because some of the energy is absorbed by surroundings
Condensation is exothermic. Energy is released during condensation. Energy can not be "lost" but merely change from one form to another.