Energy can exist in several forms and may change from one form to another. For each of the following. slate the energy changes that occur in:
(a) the unwinding of a watch spring
(b) a loaded truck when started and set in motion
(c) a car going uphill
(d) photosynthesis in green leaves
(e) Clinging of a battery.
(f) respiration.
(g) burning of a match stick
(h) explosion of crackers.

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Solution

(a) Potential energy of wound up spring converts into kinetic energy.
(b) Chemical energy of petrol or diesel converts into mechanical energy (kinetic energy)
(c) Kinetic energy to potential energy
(d) Light energy changes into chemical energy
(e) Electrical energy changes into chemical energy
(f) Chemical energy changes into heat energy
(g) Chemical energy changes into heat and light energy
(h) Chemical energy changes into heat light and sound energy

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Similar questions

Thermodynamics mainly deals with
(a) interrelation of various forms of energy and their transformation from one form to another.
(b) energy changes in the processes which depend only on initial and final states of the microscopic systems containing a few molecules.
(c) how and at what rate these energy transformations are carried out.
(d) the system in equilibrium state or moving from one equilibrium state to another equilibrium state.

Answer in brief :

(a) When can we say that something has been set in motion?

(b) What effects can be seen when force is applied to an object?

(d) Which are the different forms of energy?

(e) Explain : Heat is a form of energy.

State the energy transformation in the following:

(a) explosion of a cracker

(b) respiration

Q. name the sequence of energy changes taking placing in setting a truck in motion

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