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ENTER HERE:- WAEC 2017 PHYSICS (THEORY AND OBJ) ANSWERS – MAY/JUNE EXPO




Physics obj
1-10 CAABADACC
11-20 BAADDCBADA
21-30 CCBACBCBAB
31-40 ACADDBBBAC
41-50 BCDABCABCA

12aii)a)A graphite reactor is a nuclear reactor that uses carbon as a neutron moderator, which allows un-enriched uranium to be used as nuclear fuel.
5a)
i)force
ii)length
5b)
by increasing the density mosquitoes lavrva than the density of water
===========
12aii)b)Boron rods are used in
nuclear reactors to control the fission rate of uranium and plutonium. They are composed of chemical elements such as boron, silver, indium and cadmium that are capable of absorbing many neutrons without themselves fissioning.
8d (i)pushing someone on a swing.

(ii)Tuning a radio to a particular frequency.
5a)
i)force
ii)length

5b)
By increasing the density mosquitoes lavrva than the density of water


12ai)Nuclear fission is a nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy.

12aii)a)A graphite reactor is a nuclear reactor that uses carbon as a neutron moderator, which allows un-enriched uranium to be used as nuclear fuel.

12aii)b)Boron rods are used in
nuclear reactors to control the fission rate of uranium and plutonium. They are composed of chemical elements such as boron, silver, indium and cadmium that are capable of absorbing many neutrons without themselves fissioning.
6i)Energy efficient- so far the best light for interior lighting.
ii)Low production cost (of tubes, not of the ballasts)
iii)Long life of tubes.
2)given that U=15m3^-1
R=U* sqr2h/g
h=20m
g=10
R=15*sqr2*20/10
R=15*sqr40/10
R=15*sqr4
R=15*2=30m
R=30m
8b)If their distance and masses are doubled their corresponding force would also be doubled and the work done respectively
I.e.Workdone=Force * distance
Force= Mass * Acceleration
W= Mg * d
|
Increase
2)given that U=15m3^-1
R=U* sqr2h/g
h=20m
g=10
R=15*sqr2*20/10
R=15*sqr40/10
R=15*sqr4
R=15*2=30m
R=30m

3i) Brownian Motion
II) Atomic Size
Iii) Expansion


5a)
i)force
ii)length

5b)
By increasing the density mosquitoes lavrva than the density of water

6i)Energy efficient- so far the best light for interior lighting.
ii)Low production cost (of tubes, not of the ballasts)
iii)Long life of tubes.

7)
i)It requires low voltage sources for it to function
ii)It cannot be easily broken
iii)It is cheaper and quite easy to manufacture


8b)If their distance and masses are doubled their corresponding force would also be doubled and the work done respectively
I.e.Workdone=Force * distance
Force= Mass * Acceleration
W= Mg * d
|
Increase

8c) -Acceleration due to gravity
- At maximum height, final velocity is zero


8d (i)pushing someone on a swing.

(ii)Tuning a radio to a particular frequency.

10a) A wave front is an imaginary surface passing through the points of a medium oscillatory in phase


12ai)Nuclear fission is a nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy.

12aii)a)A graphite reactor is a nuclear reactor that uses carbon as a neutron moderator, which allows un-enriched uranium to be used as nuclear fuel.

12aii)b)Boron rods are used in
nuclear reactors to control the fission rate of uranium and plutonium. They are composed of chemical elements such as boron, silver, indium and cadmium that are capable of absorbing many neutrons without themselves fissioning.
8a) It is a straight line graph
II) The gradient is the velocity
10bi)Prismatic binoculars is used to see round corners
3)
i)Brownian motion
ii)Atomic size
iii)Expansion
================================
===
2)
given that U=15m3^-1
R=U* sqr2h/g
h=20m
g=10
R=15*sqr2*20/10
R=15*sqr40/10
R=15*sqr4
R=15*2=30m
R=30m
================================
===
5a)
i)force
ii)length
5b)
by increasing the density mosquitoes lavrva than the density of water
================================
===
6)
i)Energy efficient- so far the best light for interior lighting
ii)Low production cost (of tubes, not of the ballasts)
iii)Long life of tubes
================================
===
12ai)
Nuclear fission is a nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy.
12aii)
A graphite reactor is a nuclear reactor that uses carbon as a neutron moderator, which allows un-enriched uranium to be used as nuclear fuel.
12aiii)
Boron rods are used in
nuclear reactors to control the fission rate of uranium and plutonium. They are composed of chemical elements such as boron, silver, indium and cadmium that are capable of absorbing many neutrons without themselves fissioning.
================================
SECTION A ANS 5QUESTION
================================

1)
decrease in height (h)
increase in time (t)
this shows that distance changes with time
==================================
3)
i)Brownian motion
ii)Atomic size
iii)Expansion
================================
2)
given that U=15m3^-1
R=U* sqr2h/g
h=20m
g=10
R=15*sqr2*20/10
R=15*sqr40/10
R=15*sqr4
R=15*2=30m
R=30m
=============================
4)
L1=14cm F1=4N,F2=6N
L2=4cm, Lo=?
Using hooke's law
4/14-Lo*6/4-Lo
4(4-Lo)=6(14-Lo)
16-4Lo=64-6Lo
-4Lo+6Lo=64-16
2Lo=48
Lo=48/2
Lo=24Cm
=============================
5a)
i)force
ii)length
5b)
by increasing the density mosquitoes lavrva than the density of water
=================================
6)
A)Energy efficient- so far the best light for interior lighting
B)Low production cost (of tubes, not of the ballasts)
C)Long life of tubes
================================
7)
i)It requires low voltage sources for it to function
ii)It cannot be easily broken
iii)It is cheaper and quite easy to manufacture
==================================

SECTION B ANS 3 QUESION
================================
12ai)
Nuclear fission is a nuclear reaction in which a heavy nucleus splits spontaneously or on impact with another particle, with the release of energy.
12aii)
A graphite reactor is a nuclear reactor that uses carbon as a neutron moderator, which allows un-enriched uranium to be used as nuclear fuel.
12aiii)
Boron rods are used in
nuclear reactors to control the fission rate of uranium and plutonium. They are composed of chemical elements such as boron, silver, indium and cadmium that are capable of absorbing many neutrons without themselves fissioning.
8b)
If their distance and masses are doubled their corresponding force would also be doubled and the work done respectively
I.e.Workdone=Force * distance
Force= Mass * Acceleration
W= Mg * d
|
Increase
8c)
-Acceleration due to gravity
- At maximum height, final velocity is zero
8d)
i)pushing someone on a swing.
ii)Tuning a radio to a particular frequency.
================================
===
10a)
A wave front is an imaginary surface passing through the points of a medium oscillatory in phase
================================


Posted by: teebee » Sunday, April 09 2017 @ 23:03:41


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