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Tuesday, June 5, 2018

Physics& Economic Neco answers


 *PHYSICS PRACTICAL ANSWERS*

(2a)
In a tabular form:

Under tita°:
75, 65, 55, 45, 35

Under MO(cm):
1.1, 2.0, 2.5, 3.4, 3.9

Under NO(cm):
6.2, 6.4, 6.6, 6.8, 7.2

Under H=MO/NO:
0.177, 0.313, 0.379, 0.500, .542

Under Costita:
0.2588, 0.4226, 0.5736, 0.7071, 0.8192

(2axiii)
From the graph
Slope, S =Δcostita/^ΔH
= 0.75-0.45/0.5-0.3
= 0.3/0.2
=1.5

(2axiv) 
(i) I ensured both the object and the pins were in straight lines so as to avoid error due to parallax.
(ii)  I made sure there was no air interference

(2bi)
Snell's law of refraction states that the ratio of the sine of angle of incidence to the sine of the angle of refraction is a constant for a given pair of media. 
I.e Sini/sinr = Π
Where Π is known as refractive index.

(2bii)
Given refractive index of glass = 1.5
i.e aΠg = 1.5(from air to glass)
SinC/sin90 = gΠa
SinC/Sinn90 = 1/aΠg
SinC/1 = 1/1.5
SinC= 0.6667
C = sin^-1(0.6667)
Critical angle for glass C = 42°


====================================================


(3a)
(ii) Vo = 2.00v

(3av)
In a tabular form
Under S/N
1, 2, 3, 4, 5

Under R(ohms):
2, 3, 4, 5, 6

Under V(v):
2.10, 2.30, 2.40, 2.50, 2.60

Under R^-1:
0.500, 0.333, 0.250, 0.200, 0.167

Under V^-1(v^-1):
0.476, 0.435, 0.417, 0.400, 0.385

3vii Slope, = Δv^-1/ΔR-1
= 0.5 - 0.355/0.6 - 0
= 0.145/0.6
S = 0.242

Intercept, C = 0.355v^-1

(3aviii)
K = S/C
K = 0.242/0.355
K = 0.68

(3ix)
(i) I ensured tight connections.
(ii) I ensured clean terminals.

(3bi)
(i) Temperature of wire
(ii) Cross sectional area of wire
(iii) Length of wire
(iv) Nature of wire

(3bii)
Draw the diagram

Effective E.m.f = 2v(parallel connection)
Effective internal resistance 
= r * r/r + r = r/2ohms

Current, I , 0.8A
External resistance R = 2A
 Using,
E = I(R+r)
2 = 0.8(2+r/2)
2.5 = (2+r/2)
2.5 - 2 = r/2
0.5 = r/2
r = 0.5*2 = 1ohms
[6/5, 10:27 AM] Alaba: ==== SECTION A ( Answer any 1 Question )  =======

1a)
i)Qd=32-1/2p
When p is 6
Qd=32-1x6/2
Qd=64-6/2
Qd=58/2
Qd=29

ii)Qd=32-1/2p
When p is12
Qd=32-12/2
Qd=64-12/2
Qd=52/2
Qd=26

iii)Qd=32-1/2p
When p is 20
Qd=32-20/2
Qd=64-20/2
Qd=44/2
Qd=22

iv)Qd=32-1/2p
When p is 27
Qd=32-27/2
Qd=32-27/2
Qd=64-27/2
Qd=37/2
Qd=18.5

V)Qd=32-1/2p
When p is 32
Qd=32-32/2
Qd=64-32/2
Qd=32/2
Qd=16

1b) DRAW THE DIAGRAM

1c)
i) The price
ii) The price of other commodities
iii) Income of the consumers
iv) Taxation
v) Population
vi) Change in taste of consumer
vii) Weather And Climate
viii) Advertisement
----------------------------------------------------


===== SECTION B ( Answer any 4 Questions ) ======

3a
Production is the process of transforming inputs(raw materials) into finished products and the distribution of the products in order to satisfy human wants and to earn a living

3b)
i) Availability of Natural Resources: The volume production depends on the quantity and quality of the natural resources available in a  country. If a country has large Deposits of natural resources like fertile soil, perennial rivers, extensive forests, long sea coasts, rich minerals etc, volume of production will be high. The larger the availability of resources, the larger will be the volume.
ii) Availability of capital: Capital is an important factor in determining the volume of production. Capital includes both fixed capital and variable capital like machinery, buildings. raw materials, electricity etc. The capital depends on the level of savings and investment and banking facilities.
iii) Technology: Technology is another determinant of the volume of production. If the people possess technical knowledge, education and training, they can produce diverse goods. They can make inventions and adopt latest technology for producing goods and services. Besides, they also increase the quantity and quality of goods. Hence the nature of technology influences the volume of manufacturing or production.
iv) Factors of production: Another determinant of Volume of manufacturing or production is the factors of production. Factors of production comprise labor, capital and organization. The quantity and quality will influence the volume of production. If these are plenty, then production of goods on large scale is possible.
=================================================

4a)
Mobility of Labor:- This can be define as the ease with which labout can move from one geographical area to another, or from one occupation to another. labour is said to be movable when workers will find it easy to move from one geographical area to another or to change jobs.

4b)
i) Cost and length of training:- Some professions are costly to train in terms of time and money, e.g the medical profession.
ii) Ability or aptitude:- Some jobs require natural ability or talents and those that are not gifted can not fit into such jobs e.g. musician.
iii) Wage rate:- Labour will move if there is a wide margin in salaries but if it is low, labour may not move.
iv)  Condition of service:- Apart from Salary, the conditions of service in a working place e.g. bonuses, overtime, staff bus, will encourage labour not to move.
v) Political Instability / Religion:- Where there is political instability or religion, it will be very difficult for labour to move.

=================================================
6a)
A tax is a mandatory financial charge or some other type of levy imposed upon a taxpayer (an individual or other legal entity) by a governmental organization in order to fund various public expenditures.


6b)
I) They reduce savings:- When tax is removed from one's income, savings may become very difficult.
ii) They discourage investment:- High tax on individual and corporate bodies discourage potential investor from investment.
iii) They prone to evasions:- Direct texes are usually prone to evasion  by many income earners.
iv) They reduce purchasing power:- When tax is imposed on the income of a workers, the balance may be small thereby reducing the purchasing power of such income earner.
===================================

7a) Money is anything that ja generally acceptable as a medium of exchange and in the settlement of debts. It can also be define as anything that is generally acceptable as a means of payment

7b)
I) Transactionary motive:- People desire to keep or hold money for day to dag transactions or current expenditure. Household needs to hold money in order to cater for the interval between the receipt of income and their expenditure.
ii) Precautionary motives:- This is when people demand for money in order to meet up with unforseen circumstances or unexpected expenditure. These may include sickness, unexpected visitor etc
iii) Speculative motive:- this motive is specifically a business motive and refers to the desire to hold cash balance in order to embark on speculative dealings in the bond market. The demand to hold money for specific is elastic

===================
*NECO ECONOMICS THEORY SOLUTIONS*

*3a*
Production is the process of transforming inputs(raw materials) into finished products and the distribution of the products in order to satisfy human wants and to earn a living

*3b)* Factors That Determine The Volume Of Production:

1. Availability of Natural Resources: The volume production depends on the quantity and quality of the natural resources available in a  country. If a country has large Deposits of natural resources like fertile soil, perennial rivers, extensive forests, long sea coasts, rich minerals etc, volume of production will be high. The larger the availability of resources, the larger will be the volume.

2. Availability of capital: Capital is an important factor in determining the volume of production. Capital includes both fixed capital and variable capital like machinery, buildings. raw materials, electricity etc. The capital depends on the level of savings and investment and banking facilities.

3. Technology: Technology is another determinant of the volume of production. If the people possess technical knowledge, education and training, they can produce diverse goods. They can make inventions and adopt latest technology for producing goods and services. Besides, they also increase the quantity and quality of goods. Hence the nature of technology influences the volume of manufacturing or production.

4. Factors of production: Another determinant of Volume of manufacturing or production is the factors of production. Factors of production comprise labor, capital and organization. The quantity and quality will influence the volume of production. If these are plenty, then production of goods on large scale is possible.
[6/5, 7:44 AM] Test: ECONOMICS OBJ
1-10:ABD*CDE*C*
11-20:BECAB*B***
21-30:***DECEE*B
31-40:******CACE
41-50:*AED*****
88: 12b)

1. Corruption

In Nigeria, corruption occurs in many areas but the most common is corruption of government officials. Newspaper reports quoting EFCC, give large figures of amounts past government officials have allegedly stolen.

Ministries, Directorates and Agencies of government have a staff or two who would disrupt the smooth flow of the system to extort or get bribe from the public for a free service.
[6/5, 8:59 AM] Rufai88: 6a)a compulsory contribution to state revenue, levied by the government on workers' income and business profits, or added to the cost of some goods, services, and transactions.
[6/5, 9:00 AM] Rufai88: *3a*
Production is the process of transforming inputs(raw materials) into finished products and the distribution of the products in order to satisfy human wants and to earn a living

*3b)* Factors That Determine The Volume Of Production:

1. Availability of Natural Resources: The volume production depends on the quantity and quality of the natural resources available in a  country. If a country has large Deposits of natural resources like fertile soil, perennial rivers, extensive forests, long sea coasts, rich minerals etc, volume of production will be high. The larger the availability of resources, the larger will be the volume.

2. Availability of capital: Capital is an important factor in determining the volume of production. Capital includes both fixed capital and variable capital like machinery, buildings. raw materials, electricity etc. The capital depends on the level of savings and investment and banking facilities.

3. Technology: Technology is another determinant of the volume of production. If the people possess technical knowledge, education and training, they can produce diverse goods. They can make inventions and adopt latest technology for producing goods and services. Besides, they also increase the quantity and quality of goods. Hence the nature of technology influences the volume of manufacturing or production.

4. Factors of production: Another determinant of Volume of manufacturing or production is the factors of production. Factors of production comprise labor, capital and organization. The quantity and quality will influence the volume of production. If these are plenty, then production of goods on large scale is possible.
[6/5, 9:01 AM] Rufai88: *4b)*
*(1) Education and Training* :
The mobility of labour depends on the extent to which Labour is educated and trained. Higher or more a person is educated and skilled. The greater are his chances of moving from one occupations or place to another. Geographical and vertical mobility is very much dependent on education and training.

 *(2) Urge to Rise in Life:*
The inner urge of the workers to rise in life determines the mobility. If workers are optimist and broad minded, they will move to other jobs and places. Differences in language, habits, religion caste etc. will not be hindrances in their mobility.

 *(3) Means of Transport and Communication* :
Well-developed means of transport and communications encourage mobility of labour. The worker knows that in case of emergency at home we can easily communicate with his family on phone or travel back by train within the country or by aero-plane if he is abroad.

 *(4) Social Set-up* :
The mobility of labour also depends upon the social set-up. A society dominated by caste system and joint family system lacks in mobility of labour. But where the joint family and caste systems do not exist or have disintegrated family, the mobility of labour increases.

 *(5) Agricultural Development:*
In a developed agricultural area or where there is agricultural development labour moves from high population to low population areas during busy seasons.

 *(6) Advertisement Relating to Jobs in Newspapers:*
Advertisement relating to jobs in newspaper also helps and determine the mobility of labour. Advertisement help workers to move between places and occupations.

 *(7) ** Industrial Development Helps Mobility:*
The mobility of labour is determined by industrial development. Workers move from different occupations and places to work in factories. Industrialisation also leads to urbanisation and workers move from rural and semi-urban areas to industrial centres and big cities.
[6/5, 9:01 AM] Rufai88: *NECO ECONOMICS OBJ AND THEORY QUESTIONS*

*3a*
Production is the process of transforming inputs(raw materials) into finished products and the distribution of the products in order to satisfy human wants and to earn a living

*3b)* Factors That Determine The Volume Of Production:

1. Availability of Natural Resources: The volume production depends on the quantity and quality of the natural resources available in a  country. If a country has large Deposits of natural resources like fertile soil, perennial rivers, extensive forests, long sea coasts, rich minerals etc, volume of production will be high. The larger the availability of resources, the larger will be the volume.

2. Availability of capital: Capital is an important factor in determining the volume of production. Capital includes both fixed capital and variable capital like machinery, buildings. raw materials, electricity etc. The capital depends on the level of savings and investment and banking facilities.

3. Technology: Technology is another determinant of the volume of production. If the people possess technical knowledge, education and training, they can produce diverse goods. They can make inventions and adopt latest technology for producing goods and services. Besides, they also increase the quantity and quality of goods. Hence the nature of technology influences the volume of manufacturing or production.

4. Factors of production: Another determinant of Volume of manufacturing or production is the factors of production. Factors of production comprise labor, capital and organization. The quantity and quality will influence the volume of production. If these are plenty, then production of goods on large scale is possible.
[6/5, 9:03 AM] Rufai88: 12a) economic growth
an increase in the amount of goods and services produced per head of the population over a period of time.
[6/5, 9:04 AM] Rufai88: 2 RED TAPE Red tape makes government slow and costly. It costs much more to get anything done due to red tape in the system. For instance, paying tax is difficult, clearing your goods at the ports is hard, and registering a new business is an uphill task.
[6/5, 9:04 AM] Rufai88: 3* Tourism
This state of insecurity is scaring foreign investors away from the country. To stop capital flight, government must decimate Boko Haram so that the economy in that area will go back to normal, and restore confidence in our security apparatus and their ability to secure the land.
[6/5, 9:04 AM] Rufai88: 4. Insurgency
The Nigerian economy depends solely on foreign exchange earnings from the sale of crude oil and gas. Until the country diversified its sources of earning foreign exchange to sectors such as manufacturing, solid minerals, and other services, the country’s economy may not improve totally.
[6/5, 10:28 AM] Alaba: *PHYSICS PRACTICAL ANSWERS*

(2a)
In a tabular form:

Under tita°:
75, 65, 55, 45, 35

Under MO(cm):
1.1, 2.0, 2.5, 3.4, 3.9

Under NO(cm):
6.2, 6.4, 6.6, 6.8, 7.2

Under H=MO/NO:
0.177, 0.313, 0.379, 0.500, .542

Under Costita:
0.2588, 0.4226, 0.5736, 0.7071, 0.8192

(2axiii)
From the graph
Slope, S =Δcostita/^ΔH
= 0.75-0.45/0.5-0.3
= 0.3/0.2
=1.5

(2axiv) 
(i) I ensured both the object and the pins were in straight lines so as to avoid error due to parallax.
(ii)  I made sure there was no air interference

(2bi)
Snell's law of refraction states that the ratio of the sine of angle of incidence to the sine of the angle of refraction is a constant for a given pair of media. 
I.e Sini/sinr = Π
Where Π is known as refractive index.

(2bii)
Given refractive index of glass = 1.5
i.e aΠg = 1.5(from air to glass)
SinC/sin90 = gΠa
SinC/Sinn90 = 1/aΠg
SinC/1 = 1/1.5
SinC= 0.6667
C = sin^-1(0.6667)
Critical angle for glass C = 42°


====================================================


(3a)
(ii) Vo = 2.00v

(3av)
In a tabular form
Under S/N
1, 2, 3, 4, 5

Under R(ohms):
2, 3, 4, 5, 6

Under V(v):
2.10, 2.30, 2.40, 2.50, 2.60

Under R^-1:
0.500, 0.333, 0.250, 0.200, 0.167

Under V^-1(v^-1):
0.476, 0.435, 0.417, 0.400, 0.385

3vii Slope, = Δv^-1/ΔR-1
= 0.5 - 0.355/0.6 - 0
= 0.145/0.6
S = 0.242

Intercept, C = 0.355v^-1

(3aviii)
K = S/C
K = 0.242/0.355
K = 0.68

(3ix)
(i) I ensured tight connections.
(ii) I ensured clean terminals.

(3bi)
(i) Temperature of wire
(ii) Cross sectional area of wire
(iii) Length of wire
(iv) Nature of wire

(3bii)
Draw the diagram

Effective E.m.f = 2v(parallel connection)
Effective internal resistance 
= r * r/r + r = r/2ohms

Current, I , 0.8A
External resistance R = 2A
 Using,
E = I(R+r)
2 = 0.8(2+r/2)
2.5 = (2+r/2)
2.5 - 2 = r/2
0.5 = r/2
r = 0.5*2 = 1ohms

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