Summary Physics Module 1 — Energy

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I I
↓
11 11
G

ee
FUEL U FUEL 1
S

elec
E H T replenise turbines are expensive to build
gener
cannot be
hydroelectricity out
+



will not
+

·
run


fossiTues reliable
· ·



·
produce CO_ when burned ↳ electricity &
CO , not produced ·
river dams hard to find
contribute to global warming ·
does not contributeto ·
causes environmental damage geothe
generation global warning G
#waste is radioactive
· alters habitats Et h
nucleartuel. retransported reliable + produces large land needed
·

· ·

large areas o

/Uranium heat as are expensive quantities energy ·
displacement of people solar
G E+ s
+Plutonium) extremelyenergy to build + decommisicu
-




dense xidal will not run out tidal barriers expensive
:

· ·




Selectricity ·
no pollution (does not to build
GW) disrupts shipping+trade blocks biofu
;




contribute to
·




LOWER - the rate of energy transfer generation large
·
sewage
reliable + produces biom
↳ measured in Watts (W) quantities g energy
a habitats affected 6 elect


↑ I
expensive to build trans
generators
:




will not run out
wind
·


-energy
transferred ---EQUATIONS
REARRANGED does not
6 no polluticu wind not reliable
:
· :




E
·




p (5) FOR POWER : electricity contribute to
global large areas o land
needed
U
-
= ·




A t -
warming
generation noisy

E
·




power (W) <time(taken) E Px t
t =




ENERGY
SYSFN
=




(s) -
->
LAW OF CONSERVATION OF ENERGY :
INPUT
needed
W
-----
SPECFICHEAT CAPACITY (SHC) the amount
- & energy
cannot be created or destroyed
-
↳
dettatheta to raise
the temp · 19 energy

---
.




mass (leg) ~
stored transferred dissipated
deta Gasubstance by 12
↳ can or
.
only be , ,




to surroundings
-
I
SHC change in
↳ measured in
5/kg°C ↳ in a closed
system ,
total amount of energy
change in energy losse ENERGYSIORE
a




ENStaythe
same.
no
(5/leg'd temperature

42p
Anermal) energy
of He0 (water)
(oC) ↳ SHC
(5) ↳ chemical

C-> YD - ⑳
ge


E2S
i) · ⑧

2
E1
thermall
REARRANGED EQUATIONSFORSHC
is
↳ I/ I I n
↳
internal


cyo)c ⑲M
-

**
E E
m
=
O =
↳ Kinetic
I⑯
=




mx 0 mxC ↳ nuclear

EFFICIENC
↑
energy store of a stretched ENERGY -
mathematicalconcesei
/object (E)
OUTRRY POIENIALENERGY LEPE
ELASTIC understrain
I - (x0 5)
-
efficiency
= use

~extension (Eff)
.




tot
-energy stored moving object
X a

2
-2 (m) -


Ee -
X He X
a 4
extension" KINETICENERGY (RE) :


I ele,
everything
Spring (N/m) massTug!
..


elastic potential quadruples(4) ---5)
(X