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Page 2

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Page 4

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Wave energy
is whe n t
he
w ater
i
n the se a r
ises
and
fal
ls
because
of
w aves
on t
he sur
face.
Wave
machines use the kinetic energy in this movement t
o
dri
ve
elect
ri
ci
ty gener
ator
s.
Ti
dal
barr
ag e
is
w hen
huge
a mou nts of
w a ter
mo ve i
n and
out
of
ri
ver mouths
each day
because of
t
he t
ides.…read more

Page 5

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H er
e t
he
steam can be
used
to dr
ive
tur
bines
a nd
elect
ri
cit
y gener
ator
s.
This
type
of
geot
hermal
pow er
stat
ion
exist
s i
n places
such as
Icel
and,
C al
if
orni
a and
It
aly
.
I
n some pl
ace s,
t
he r
ocks are
hot,
but
no
hot
w at
er
or
steam r
ises
to t
he sur
face.…read more

Page 6

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Page 7

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Ther
e ar
e
no fuel costs.
No harmful polluting gases
are
produced
.
Di
sadvant
ages
to
usi
ng
sol
ar
panel
s
:
Solar
cell
s ar
e
expensive and inefficient,
so
the
cost
of
t
hei
r el
e ct
ri
c i
ty
is high.
Alt
houg h
w ar
m w ater
can
be
pro duce d even
on cl
oudy
days,
neither solar cells nor solar
panels work at night.…read more

Page 8

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Heat Transfer and Efficiency:
Heat
can be
tr
an sf
err
ed
fr
om place
to
place
by conduct
ion,
convect
ion
an d
r
adiat
ion.
Dark
ma tt
sur
faces
are
be t
ter
at
absor
b i
ng
hea t
ener
gy t
han
li
ght
s
h i
ny
surf
a ces.…read more

Page 9

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Li
quids
and gases ar
e f
lui
ds.
T he
pa r
ti
cl
es i
n t
he se
fl
uids
can
move f
rom place
to
place.
Con vect
ion
occurs
w hen
p ar
ti
cl
e s
w i
t
h
a
lot
of
heat
energy i
n a
li
quid
or
g as
mo ve
and t
a ke
the
place
o f
par
ti
cles
w i
th
less
heat
en er
gy.…read more

Page 10

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Reducing heat loss:
I
n t
his
house,
Heat
i
s l
ost
:
t
hrough
the
roof
t
hrough
w i
ndow s
t
hrough
gaps around
the
door
t
hrough
the
w al
ls
t
hrough
the
fl
oo r
Heat
energy
is
tr
ansfer
red
fr
om homes
by…read more

Comments

Miss Meera J

very detailed and useful

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