energy can exit in several forms and may change from one form to another .for each of the following. state the energy changes that occur in.
(a) the unwinding of a watch spring.
(B)A car goINg uphill.
(c) respiration
energy can exit in several forms and may change from one form to another .for each of the following. state the energy changes that occur in.
(a) the unwinding of a watch spring.
(B)A car goINg uphill.
(c) respiration
A.
Elastic Potential energy is stored in the windings of a watch spring. This potential energy is converted into rotational kinetic energy of the parts of the watch including the hands of the watch. Also some energy is lost in the form of sound energy.
B.
When a car running the chemical energy of the fuel is converted into mechanical energy (kinetic energy) of the motion of the car by the car’s engine. As the car goes uphill the chemical energy of the fuel is used in providing a kinetic energy to the car and also the potential energy of the car increases because it is moving uphill. Some energy is lost in the form of heat and sound energy.
C.
In respiration process the chemical energy stored in the cells is used to provide the motion to the chest so that air is drawn into the lung. Here, chemical energy of the food is converted to mechanical energy of the muscle. The oxygen in the inhaled air is transported by the blood to body organs, cells etc where it is used to break food molecules to obtain energy.
A.
Elastic Potential energy is stored in the windings of a watch spring. This potential energy is converted into rotational kinetic energy of the parts of the watch including the hands of the watch. Also some energy is lost in the form of sound energy.
B.
When a car running the chemical energy of the fuel is converted into mechanical energy (kinetic energy) of the motion of the car by the car’s engine. As the car goes uphill the chemical energy of the fuel is used in providing a kinetic energy to the car and also the potential energy of the car increases because it is moving uphill. Some energy is lost in the form of heat and sound energy.
C.
In respiration process the chemical energy stored in the cells is used to provide the motion to the chest so that air is drawn into the lung. Here, chemical energy of the food is converted to mechanical energy of the muscle. The oxygen in the inhaled air is transported by the blood to body organs, cells etc where it is used to break food molecules to obtain energy.
