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#Post#: 262--------------------------------------------------
100% CORRECT FREE WAEC GCE PHYSICS OBJECTIVE AND ESSAY ANSWERS
By: Ebenezer Date: September 12, 2013, 7:02 am
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#Post#: 263--------------------------------------------------
Re: 100% CORRECT FREE WAEC GCE PHYSICS OBJECTIVE AND ESSAY ANSWE
RS
By: Ebenezer Date: September 12, 2013, 9:20 am
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Verified PHYSICS OBJ
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11-20: abaddbaccc
21-30: bcddadcada
31-40: acdbcadadb
41-50: abbcdaabac
THEORY
(6a)
- density of the substance
-temperature of the substance
(6b)
-absorbtion of ink with blotting paper
-rising of oil in lamp wick
(1)
Given, tita = 30degree , speed = 25cm/s
(a)
Time of flight (T) = 2Usin(tita)/g
= 2*250*sin30/10
= 250/10
=25s
(b)
Max - lenght =U^2 sin^2 tita/ 2g
Recall V^2=U^2 - 2gh
The speed is zero at max height
(4)
Given, current(I) = 10A
Time (T) = 1hr = 1*3600 = 3600s
Z= 1.2*10^-7kgc^-1
m = Zit
m = 1.2*10^-7*10*3600
m= 4.32*10^-3kg
(7)
i. Brownian motion
ii. Tidal movement
(10)
i. Electron Diffraction
ii. Inference
iii. Reflection
#Post#: 264--------------------------------------------------
Re: 100% CORRECT FREE WAEC GCE PHYSICS OBJECTIVE AND ESSAY ANSWE
RS
By: Ebenezer Date: September 12, 2013, 9:35 am
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WAEC GCE PHYSICS;
Verified PHYSICS OBJ:
1-10: bdccbabdcb
11-20: abaddbaccc
21-30: bcddadcada
31-40: acdbcadadb
41-50: abbcdaabac
NOTE: tita is tita sign.
^ Means RAIST TO POWER.
Degree means degree sign.
(1) Given, tita = 30degree , speed = 25cm/s
(a)
Time of flight (T) = 2Usin(tita)/g
= 2*250*sin30/10
= 250/10
=25s
(b)
Max - lenght =U^2 sin^2 tita/ 2g
Recall V^2=U^2 - 2gh
The speed is zero at max height
(4)
Given, current(I) = 10A
Time (T) = 1hr = 1*3600 = 3600s
Z= 1.2*10^-7kgc^-1
m = Zit
m = 1.2*10^-7*10*3600
m= 4.32*10^-3kg
(6a)
- density of the substance
-temperature of the substance
(6b)
-absorbtion of ink with blotting paper
-rising of oil in lamp wick
(12ai)it causes change of state of matter.
(ii)it increases the temperature of a matter.
(iii)it increases the average kinetic theory of the molecules in
the matter
(12bi)when a boiling water is poured into a thick glass,the
inner of the glass suddenly become hotter than the outer layer
causing irregular expansion hence creating a non-uniform
pressure in the structure of the glass material hence it cracks.
(12bii)the claws of a cat is naturally designed to create the
required frictional force necessary for locomotion as a result
of grip.but on a polished floor where gripping is
impossible,hence,frictional force is minimal.
#Post#: 265--------------------------------------------------
Re: 100% CORRECT FREE WAEC GCE PHYSICS OBJECTIVE AND ESSAY ANSWE
RS
By: Ebenezer Date: September 12, 2013, 9:39 am
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(4)
Given, current(I) = 10A
Time (T) = 1hr = 1*3600 = 3600s
Z= 1.2*10^-7kgc^-1
m = Zit
m = 1.2*10^-7*10*3600
m= 4.32*10^-3kg
(7)
i. Brownian motion
ii. Tidal movement
(10)
i. Electron Diffraction
ii. Inference
iii. Reflection
(12ai)it causes change of state of matter.
(ii)it increases the temperature of a matter.
(iii)it increases the average kinetic theory of the
molecules in the matter
the pressuere law states that the pressuere of a
fixed mass of a gas at constant volume is directly
proportional to the temperature.
(12bi)
this is because of expansion of the glass cup because
the temperature of boiling water is greater than the
glass cup.
(12bii)
this is because of the absence of frictional force on
highly polished floor.
(12cii)
given T1+20degrees=20+273=293k
T2=?
P1=76cmHg
p2=69cmHg
p1/T1:-p2/T2
76/293=69/T2
76*T2=69*293
T2=69*293=266k
T2=-7degree
(13a)
(i)
Object distance(u)= a
Image distance(v) = b
f^2 = ab
(ii)
1/a+1/b = 1/f
1/16 - 1/25 = 1/f
1/f = 25-16/ 400
1/f = 9/400
f = 400/9 = 44.4cm
(iii)
Magnification(M) = v/u =b/a
M= 25/16 = 1.5625
M=1.6
(13b)
(i) Principal focus is the point mid-way between the
pole of a curved mirror and the centre of curvature in
which all rays that are parallel and close to the
principal axis appear to converge or diverge
(ii) Optical Centre: this is the centre of the lens
(iii) Focal lenght: This is the distance between the pole
and the principal focus of mirror or lens
(15a) This is because neutron is very light when
compared with alpha particle
(15b)
i. They are negatively charged
ii. They can cause florescent
iii. They can ionize gases at high tempature
iv. They are fast moving electron
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