*13ai)*
i)Used for heating / evaporating water in Salt industries
ii)Used in solar panel for electrification
*13aii)*
Renewable energy is that produced from energy source which can be replenished. Non Renewable energy is not replenished enchants upon us
*13b)*
In a jet, gases are burnt within the combustion Chambers of the engine. As jets of hot gas expelled backwards through tails nozzles at very high speed. An equal and opposite momentum is given to the jet which then move it forward
*13c)*
Given:
Mass m, =0.2kg
Heat lost it = 4200J
Initial temperature θi= 100°c
Final temperature θf =?
Salt C of water, Cw = 4200j/kg/k
Using
Heat lost Mw Cw (θi - θf)
4200 = 0.2×4200 × ( 100 - θf)
(100 - θi) = 4200 / 0.2× 4200
100 - θf = 5
100 - 5 = θf
===>θf =100 - 5
θf =95°c
Final temperature = 95°c
16a
Heisenberg Uncertainty Principle States that it is impossible to know accurately the exact possible and momentum of a particle simultaneously.
16b
1 the electrons found in an atom can only occupy orbits for Which the angular momentum is quantized which results in discrete values for the radius and energy
2. If an electron jumps to a lower state, it emits a photon whose energy equals the difference in energy between the two States (hf=Eu-El), f is the frequency of the light emitted.....
Still typing..........
17ai)
Scientific research: rockets are used by scientists to explore d earth's atmosphere. The rockets carry metereological equipment such as barometers,cameras,thermometers, etc up to the atmosphere and up there,they are used to measure weather conditions and make weather forecasts. These weather equipments are carried in weather satellite and transported into the atmosphere by a rocket.
___________________________
17aii)
Power: electricity is needed for the instruments and to enable the spacecraft directional control. In most cases , power is provided by solar arrays. Sometimes, in cases like the recently launched ,saturn-bound satellite,called CASSINI, solar arrays do not supply enough power for planetary probes; instead,nuclear generators are used.
COMMUNICATION: the satellite with ground control so directions and commands can be sent up and down. To provide radio contract,satellites have radio antennae
_______________________
17b)
It increases the life span of the machine
It reduces wear nd tear.
_________________________
17c)
1a) i) The body tube
ii) The launch jug
ii) The fins
iv)The engine holder
V) The nose cone
Vi) The recovery device
b) i) Telepresence
ii) Broadcasting
iii) Tele communication
iv) internet and multimedia
*_NIK ™✓✓💯💯*
4) The specific latent heat of vaporization of a substance is the quantity of heat required to change unit mass of the substance from its liquid at the boiling point to vapour without a change in temperature
ii) potential energy is simply stored energy or the energy possessed by a body by virtue of its position while
Kinetic energy is the energy possesed by a body by virtue of its motion
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
*NIK ™✓✓*
3) The examples of stable equilibrium are :
a) a cone resting on its base
b) a racing car with low centre of gravity and wide base
Examples of neutral equilibrium are;
a) a cone or cylinder or an egg resting on its side
b) a ball on a smooth horizontal table
II) a ship is able to float because it is designed to displace a large volume of water, thus providing a big upthrust.
6) Wave front is defined as a line or surface in the path of an advancing wave on which all the particles are in the same phase or state of disturbance
ii) a) transverse wave
b) longitudinal wave
*BRAVO-™✓✓*
No10)
1. Fusion makes more energy than fission.
2. No nuclear waste to figure out how to dispose of safely.
3. Less energy u
sed to fuse than to split.
=======================
*PHYSICS THEORY* *SOLUTION*
*BY NIK™® of KOLLYTECH*
*9a)*
i) Over charging(for secondary cell) ii)self discharge (for primary cell)
*9b)*
Self discharge:A primary cell lose a considerable percentage of their charge when stored at room temperature. This is due to non-current producing "side" chemical reaction that occur within the cell even when no load is applied
_________________________-
*10)*
i)Fusion is more easily achieved with lightest elements such as hydrogen
ii) The raw materials required for fusion are more cheaply and readily available
iii) Fusion process produce less dangerous by-products
1b)
Given:
Object distance for eyepiece=3.0cm
Final image distance V =?
Focal length of eyepiece f=5.0cm
Using mirror / lens formular
1/f = 1/u + 1/v
1/5= 1/3 + 1/v
Multiplying through with 15v
3v = 5v + 15
3v - 5v = 15
-2v = 15
V = - 15/2
V= - 7.5cm
The final image is virtual and 7.5cm from the eyepiece on the same side of the eyepiece as the object
b. Wind
II) M1U1 + M2U2 = (M1 + M2) V
M1 = 15kg, M2= 5kg u1=10m/s u2=0 v=?
Momentum before = momentum after
15×10 +5×0 = (15 +5)v
150 + 0 = 20v
150 = 20v
V=7.5m/s
*12ai)*
Newtons second law of motion state that the rate of change of momentum of a body is proportional to the applied force and take place in the direction of the surface
*12aii)*
i)A swinging pendulum
ii) motion of the balance wheel of a watch
*12bi)*
A resultant force is that single force which could have the same effect in magnitude and direction as the original force acting together
*(12bii)*
Am equilibrium force is that single force which will balance all the other forces taken together.it is equal in magnitude but opposite in direction to the resultant force
12ci)
Resultant force F =√4^2 + 3^2
F =√16 + 9
F =√25
F=5N
2cii)
Using F = m(v - u) / t
5= 5.5 (v - 2) / (5 × 60)
=5 × 60×5 = 5.5(V-2)
5.5(V - 2) = 1500
V - 2 = 272.7
V=272.7 + 2
V=274.7m/s
Final velocity of body is = 274.7m/s
Click here to reload for more answers
=======================
Be
You are going to ans 6 questions from session a number 1 compulsory
All your questions is 17 from session B you Will choose. MTN CARD FOR ALL UPDATE AND QUESTIONS WITH ANS
1 comment:
Don't dull your self ooo no Free runs
Dis is core subject. From dito dito
Post a Comment