Question

energy exist 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 loaded truck when started and set in motion
c)a car going uphill
d)charging of a battery
e)photosynthesis in green leaves
f)respiration
g)burning of a matchstick
h)explosion of crackers

Answer 1

hey !!
your answer is --

(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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Answer 2

Answer:

1. P.E to K.E
2. C.E to K.E
3. K.E to P.E
4. E.E to C.E
5. L.E to C.E
6. C.E to H.E
7. C.E to L.E
8. C.E to H,L,S. E