Monday 10th July Paper III &II: Objective & Esaay Physics - 10:am - 1:00pm Physics obj 1-10 CEABCBAABB 11-20 DCCBCBCCAE ...
Monday 10th July
Paper III &II: Objective & Esaay
Physics - 10:am - 1:00pm
Physics obj
1-10 CEABCBAABB
11-20 DCCBCBCCAE
21-30 BECDDBEDDE
31-40 DBAEADBABA
41-50 CBDCBBBDCB
51-60 CEDDCBAEAA
1ai)- The body tube
- The launch lug
1aii ) Broadcasting. This involves mainly television broadcast
- Internet and multimedia . This involves communication and exchange of information through the internet
1b ) loading.........
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3a )-Book lying on table
-A car engine that keeps running for a constant for a considerable length of time
3aii )
-Rolling ball
-Pendulum ball
3b ) Ship floats in water , although they are made of steel and iron which are materials denser than water . This Is because the ship is hollow I . e an open object .
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4a.
The specific latent heat of vaporisation, L of a substance is the heat quantity required to convert one unit mass of a liquid into water vapour at its boiling limit without any change in temperature.
Its unit is JKg-1.
4b.
-Kinetic energy is energy possessed by a body by virtue of its movement.
-Potential energy is the energy possessed by a body by virtue of its position or state.
- kinetic energy of an object is relative to the state of other objects in its environment,
-potential energy is completely independent of its environment
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6a . Wave front is a line or surface in the path of advancing wave on which all d particles are in the same phase or state of disturbance.
6b . -Plane wave front
- Spherical or circular wave front .
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7i )- Pupil. The pupil serves as the passage for light into the eye
ii )- Shutter . The Shutter works on the stimulation of light before photograph can be taken
III ) Screen of pinhole camera . Ihelps to form images which are inverted
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PART II
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12 ai) Newton' s second law of motion states that the rate of change of momentum is proportional to the impressed fotvr and takes place in the direction of the force
12 aii)- The motion of the strings in a musical instrument eg. Guitar
- The motion of the balance wheel of a watch
12 bi) Resultant force is that single force which acting alone will have the same effect in magnitude and direction as two or more forces acting together
12 bii ) Equilbrum force is that single force which will balance all the other forces taken together . It is equal in magnitude buy opposite in direction to the resultant force
12 c ) loading.......
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13 ai)- Solar energy is for providing a cheap and clean source of hot water supply .
- Solar energy provides electricity supply
13 aii)- Renewable energy are those that can be replaced as they are used up. They can be continually replenished as they are exploited and utilized while Non - Renewable energy are those that cannot be replenished as they are used up
-Examples of renewable energy are Solar energy , wind energy , Biomass and Bio feuls while examples of Non renewable energy are Coal and wood , Fossil fuel, Petroleum and Natural gas , Nuclear energy
13 b) The principle of conservation of linear momentum us also utilized in the propulsion of jet aircraft . Gases are burnt within the combustion chambers of the engine. As jets of hot gases are expelled downwards through the tail nozzle at very high speeds from the aircraft , an equal and opposite momentum is given to the rocket or aircraft which then moves
13 c )
Loading . . . . . .
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13ai)
i)Solar energy is for providing a cheap and clean source of hot water supply.
ii)Solar energy provides electricity supply
13aii)
Renewable energy are those that can be replaced as they are used up. They can be continually replenished as they are exploited and utilized while Non-Renewable energy are those that cannot be replenished as they are used up
13b)
The principle of conservation of linear momentum us also utilized in the propulsion of jet aircraft. Gases are burnt within the combustion chambers of the engine. As jets of hot gases are expelled downwards through the tail nozzle at very high speeds from the aircraft, an equal and opposite momentum is given to the rocket or aircraft which then moves
13c)
Given: mass, m=0.2kg
heat lost,it=4200J
intial temperature cost r= 100'C
final temperature cost=?
S. It . c of water, C10=4200J/kg/k
using:
heat lost= M10, C10 (cost-tf)
400=0.2*4200*(100-costf)
=4200/0.2*4200
100-costF=5
100-5=costf
=cost=100-5
costf=95'C
final temperature=95'C
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14ai)
A transverse wave is one which travels perpendicularly to the direction of the vibration producing the wave.
14aii)
i)Light Wave do not need a material medium for preparation, but sound wave does
ii)Light wave cannot be plane polarised but sound wave can
14b)
Given Y= 4sin (100x22/7xt/2 + 0.5x)
Comparing with
Y = A sin (2xPIxft + 2pi/pi x) Note : {the PI is the 22/7}
14bi)
2 x 3.142/0.5 = 12.56cm
Hence Wave length is 12.56
14bii)
Also 1000PI/wave length = 2PI F
= 1000PI/12.56 = 500/12.56
= 39.8Hz
14biii)
Speed (v) = F x Wave length
= V = F x Wave Length
V = 500/12.56 x 12.56
= 500cm/s
Conversation to M = 500/100
= 5m/s
15a)
Coulomb's Law state that the magnitude of the electrostatic force between two point charges is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them.
15bi)
diagram
R1
R2
R3
I<-V
15bii)
let equivalent resistance be R
1/R=1/R1+1/R2+1/R3
1/R=R2,R3+R1,R3+R1,R2/R1,R2,R3
R=R1,R2,R3/R1,R2,+R2,R3+R1,R3
15C)
Given; R=20n,C=4HF,F=50H2,TI=3.14
z=sqr R^2+(1/2TiFc)
z=sqr200^2+(1/2*314*50*4*10^-6)
z=sqr200^2+796.178^2
z=sqr40000+633900
z=sqr673900
z=821n
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