Which of the following states is NOT a permanent member of the UN Security Council?
France
China
Japan
United Kingdom
USADeseleziona risposta

Which ancient Greek is referred to as the father of Western medicine?
Aristotle
Aristophanes
Plato
Hippocrates
SocratesDeseleziona risposta

Amnesty International (AI), a non-governmental organisation for the protection of human rights enshrined in the Universal Declaration of Human Rights, opposes the death penalty. Which one of the following reasons for opposing the death penalty is inconsistent with the principles of AI.
The death penalty can be carried out on an innocent person
The death penalty is contrary to theological principles
The death penalty is cruel, inhuman and degrading
The death penalty is not a deterrent against crime
The death penalty, once carried out, cannot be reversedDeseleziona risposta

Three red balls, three yellow balls and one green ball are placed in a bag and the bag is shaken. I place my hand in the bag and pull out a red ball followed by a green ball. I do not replace either ball.
Which one of the following statements is true?
The next ball will definitely be yellow
The next two balls cannot both be red
The next ball could be any one of red, yellow or green
At least one of the next three balls must be red
At least one of the next three balls must be yellowDeseleziona risposta

My friend has three children, Alice, George and Hannah and I need to buy two presents for them to share. I want to buy two different toys and I want to make sure that Alice, George and Hannah will each like at least one of them. I don't want the toys to have small parts.

How much am I going to pay in total?
€ 16
€ 19
€ 20
€ 15
€ 24Deseleziona risposta

The number of visitors to the local swimming pool at different times on Wednesday last week is recorded in this table:



Which chart shows the data from the table?




Deseleziona risposta

The polis is the most important institutional expression of the classical Greek way of life. What type of state is it?
A federal state
A modern state
A city state
A monarchical state
A tyrannical stateDeseleziona risposta

Which set of statements about Dante Alighieri is correct?
he was from Florence, wrote poetry, died before 1400
he was from Milan, was born in the thirteenth century, died before 1400
he was from Milan, was the son of Giulia Beccaria, wrote poetry
he was from Tuscany, wrote poetry, was the son of Giulia Beccaria
he was of noble family, was born in the fourteenth century, wrote tragediesDeseleziona risposta

Which of the following is NOT true of the Enlightenment?
It was a cultural trend that spread across Europe, which emphasised the sovereignty of the people, as a carrier of values
It was a cultural trend that highlighted all the social and economic inequalities, and paved the way for the French Revolution
It was a cultural trend that spread across Europe, mainly in France, in the early 1700s
It was a cultural trend, according to which the only real art was rational, understandable by all, and identified itself with Greek and Roman art
It was a cultural trend that was based on the exaltation of reason that, eliminating any irrational element of knowledge, by itself, revealed the truth without the help of the transcendental realm. In France this lead to materialism and atheismDeseleziona risposta

Two security guards, Dave and Geoff, are patrolling an airbase. Dave passes the front gate every 8 minutes. Geoff passes the front gate every 15 minutes. They have just set off on their individual routes at the start of their shift.
How long will it be before they meet up at the front gate again?
1 h 30 mins
1 h 00 mins
2 h 30 mins
3 h 00 mins
2 h 00 minsDeseleziona risposta

Employees at a printing company are paid a basic rate of €11 per hour during the day Monday to Friday. During weekday evenings and on Saturdays they are paid at one and a half times the basic rate and on Sundays they are paid at double the basic rate.
The table below shows the hours worked by employees last week:




Which employee earned most last week?
Daniel
Ben
Chetan
Alice
EllenDeseleziona risposta

A teacher in a school for children from 11 to 16 years old sets a code number to unlock his classroom door. He has a method for remembering his code. He uses:
 
• the 2 digits of his birth month reversed (for example, February would be 02 reversed to 20);
• then the age of the children in his class at the start of the year with the digits reversed;
• and finally, the date of his birthday in the month, also reversed.
 
Which one of the following could not be the code to unlock his door?
903121
701131
215150
602124
115191Deseleziona risposta

It has long been thought that birds are much less intelligent than humans and apes. But now it seems that some species of birds have the same kind of thinking skills as apes. Crows can create and use tools and are socially sophisticated when finding and protecting food. So how can a bird with a walnut-size brain be capable of such achievements? The answer is that both crows and apes have much bigger brains than you would expect from the size of their bodies. The same pattern is found in humans, parrots and chimps - all intelligent animals.
Which one of the following can be drawn as a conclusion from the above passage?
Crows are more intelligent than other species of birds
Relative brain size is a better indicator of intelligence than absolute brain size
Animals that cannot create tools are not intelligent
Apes are not as similar to humans as had been thought
It could be argued that birds are as intelligent as apesDeseleziona risposta

There is a higher than average risk of death or injury to young drivers and their passengers. In 2007, 32 per cent of car driver deaths and 40 per cent of car passenger deaths were people aged between 17 and 24. Young male drivers were much more likely to be killed or seriously injured than young female drivers. So in order to reduce the number of road accidents and the numbers of people killed or injured, young people should not be allowed to drive until they reach the age of 24.
Which one of the following is an assumption on which this argument depends?
Young people would not accept the raising of the legal driving age
The driving test does not effectively test the skill of drivers
Most of the accidents involving young people were the fault of the young drivers
The majority of drivers aged between 17 and 24 drive dangerously
Amongst drivers aged between 17 and 24 there are more male drivers than female driversDeseleziona risposta

Some disabled people find it difficult to gain access to some of our older public buildings because the entrances have steps. The problem is most often solved by installing ramps. All public buildings must be accessible to everyone therefore they must all install ramps.
Which one of the following identifies the flaw in this argument?
Some older public buildings without ramps may be accessible to disabled people
Installing ramps in all public buildings would be extremely expensive
It is unreasonable to suggest that disabled people should be able to access all public buildings
Disabled people must have access to all buildings not just public ones so all buildings should have ramps
Inaccessible public buildings should be replaced by buildings accessible to allDeseleziona risposta

A street of houses is numbered starting on one side with 1,2,3,4. At the far end the numbers continue down the other side in the opposite direction so the largest number is opposite number 1. The houses are of identical widths so each house has another directly opposite it.
If number 17 is directly opposite number 56, how many houses are there in the street?
37
39
36
72
73Deseleziona risposta

A courier starts the day in London and makes two round trips to Prague in the day. When she arrives at either airport, she takes the next available flight back.
The daily timetable is shown below (all times are local):

How long is the courier’s day from first take-off to last landing?
8 hours 5 minutes
8 hours 20 minutes
4 hours 50 minutes
14 hours 35 minutes
11 hours 20 minutesDeseleziona risposta

My three local supermarkets all currently have offers on my favourite breakfast cereal as follows:
 
1. Buy one standard pack get a second half price
2. Price of a standard pack reduced by 1/3
3. Normal price of a standard pack, pack contains 25% extra
 
Which of the offers are equivalent in terms of price per unit amount of cereal?
1 and 3 only
2 and 3 only
1, 2 and 3
none
1 and 2 onlyDeseleziona risposta

If the Carnival Committee does not follow the new European regulations then it may be impossible to guarantee safety. The probable consequence of this would be a heavy fine, which would severely reduce the carnival fund, and could be disastrous for the committee’s finances. Either the committee must meet the safety requirements or the future of the carnival may be under threat.
Which one of the following best expresses the conclusion of this argument?
Safety at the carnival has reached dangerously low levels
If the European regulations are not followed the carnival may not survive
Failure to improve safety could result in a heavy fine
A heavy fine could mean financial disaster for the carnival
If the regulations are followed then the carnival will take place again next yearDeseleziona risposta

87% of the world population are right-handed. The human world is organised to make success in life easier for the majority. Left-handed people should therefore be considered as having a disability and receive appropriate support.
Which one of the following, if true, weakens this argument?
Left-handed people have poorer spatial skills which makes them more likely to have car crashes and other serious accidents
Left-handed people are more likely to have health problems such as allergies, depression, epilepsy and sleeping disorders
Amongst top scientists, sportsmen, actors, musicians and politicians the percentage of left-handed people is much higher than 13%
Hand tools, musical instruments and scissors are designed for use by the majority
Many left-handed people were forced to write with their right hand when they were at schoolDeseleziona risposta

In North America in the 1800s, arguments were often settled by gunfights, in which two people stood face to face a distance apart and tried to shoot one another. Recent experiments on human response times have shown that people act more quickly when responding to an action than when they are the first to move. This supports the view that our brain uses different routes in our nervous system to send messages for intentional and reactive movements.
Which one of the following can be drawn as a conclusion from the above passage?
Scientific experiments produce interesting findings
Gunfighters who wait for their opponent to move first would always win
Gunfighters are best advised to wait for their opponents to move to fire
Brains cannot control our reactive movements
Humans can be trained to react more quicklyDeseleziona risposta

A taxi driver charges €1.00 per kilometre for the first 3 kilometres of a journey, and 70c per kilometre for the rest of the journey. I travel home from the train station by taxi. I pay the taxi driver €10.00 including a tip of 70c.
How far is my house from the station?
10 kilometres
12 kilometres
9 kilometres
13 kilometres
14 kilometresDeseleziona risposta

The table below relates to electricity generation in the United Kingdom:



Which category of station made the largest contribution to the increase in total units generated over the 10 years covered by the table?
Coal, Oil and Gas
Gas Turbines and Oil Engines
Hydro-Electric (Natural Flow)
Hydro-Electric (Pumped Storage)
NuclearDeseleziona risposta

The pie chart shows the favourite ice cream flavour for a sample of students in a school.



Which one of the rows in the table below could show the number of students who chose each flavour?
Vanilla: 26, Raspberry: 61, Strawberry: 73, Chocolate: 73, Mint: 37
Vanilla: 5, Raspberry: 34, Strawberry: 36, Chocolate: 35, Mint: 10
Vanilla: 15, Raspberry: 29, Strawberry: 32, Chocolate: 31, Mint: 13
Vanilla: 23, Raspberry: 41, Strawberry: 35, Chocolate: 35, Mint: 16
Vanilla: 36, Raspberry: 55, Strawberry: 71, Chocolate: 72, Mint: 36Deseleziona risposta

If more workers worked for only four days each week there would be fewer commuters, and therefore less traffic congestion and less pollution. Also, fewer people would be unemployed because there would be more work to go around. There is evidence that part-time workers are absent from work less often than full-time workers, so a person working a four-day week would be more productive. Less work means less pressure, which means less stress and people would be happier.
Which one of the following can be drawn as a conclusion from the above passage?
There would be less pressure on the health services if most workers were on a four- day week
There would be many benefits to working a four-day week
The economy would be more competitive if people worked more productively
The government should enforce a four-day working week
People choosing to work a four-day week would have to take a 20% pay cutDeseleziona risposta

Migratory birds which are unable to fly long distances without resting have to use the shortest distance over water in their flights to and from Africa, and so they cross at the Straits of Gibraltar. It is essential for these birds, some of which are very rare, that the route remains open. For that reason, it is important that plans to build electricity-generating wind farms on the hills surrounding the Straits of Gibraltar do not goahead.
Which one of the following is an assumption on which this argument depends?
Electricity-generating wind farms have to be built on hills
The birds that migrate across the Straits of Gibraltar are close to extinction
Other species of bird can fly further and can thus use other routes in their migration
The planned wind farms will make it dangerous for migratory birds to use their route
There are no plans to build wind farms at other places along the coastDeseleziona risposta

When mobile phones were introduced there were concerns about the microwaves produced  and the effects that these could have on the brain, given that phones would be held close to the ear when being used. These concerns have been shown to be mistaken since mobile phones are used for sending text messages far more than for making phone calls. Sending a text message does not require the phone to be anywhere near to the brain so it cannot cause any problems.
Which one of the following identifies the flaw in this argument?
It ignores evidence suggesting that text messaging is only popular in certain age groups
It does not consider uses of mobile phones other than making phone calls and sending text messages
It ignores the possible effects of the phone calls that are made
It does not consider other technology such as wireless internet which could cause similar problems
It ignores research showing that microwaves from the phones cannot penetrate far enough to reach the brainDeseleziona risposta

I have two cousins. One was born the year before me, on June 3rd. The other was born the year after me, on April 28th.
 
My birthday is May 15th.
 
For how many days each year am I the same age as one or other of my cousins?
35
37
38
39
36Deseleziona risposta

The table shows the number of people aged 20-35, 36-50 and 51-65 who participated in given sports at a leisure centre on a Sunday morning:



In which of the other sports was the proportion of participants in the three age ranges closest to that for swimming?
Aerobics
Squash
Table Tennis
Bowls
TennisDeseleziona risposta

Apples cost 30c each, bananas cost 40c each and oranges cost 50c each. Daniel spends exactly €2 buying fruit.
Which of the statements below are correct?
 
1. He cannot have exactly 3 apples
2. He must have at least one banana
3. He has 4, 5 or 6 fruits
4. If he has all 3 types of fruit, he must have fewer apples than bananas and oranges combined
 
1, 2 and 4 only
1, 2 and 3 only
2, 3 and 4 only
1, 3 and 4 only
1, 2, 3 and 4Deseleziona risposta

A comparison has been made between fast food restaurants and factories. This is not as unrealistic as it might first appear. Fast food is mass-produced, as heavily processed as any other factory product, and restaurant workers have jobs which are just as routine and boring as those in manufacturing. So not only does fast food taste the same everywhere, but all workers involved are on low wages and have little power to improve their conditions.
Which one of the following best expresses the conclusion of this argument?
Mass production in factories leads to poor working conditions
It is not unrealistic to compare fast food restaurants with factories
Workers who do routine and boring jobs are often poorly paid
All fast food tastes the same because it is heavily processed
Working in a fast food restaurant is no different from working in a factoryDeseleziona risposta

Recent research suggests that people are becoming less inclined to follow medical advice  about how to prevent ill-health. They say that there is too much advice and it is often contradictory. However the general population is living longer and is healthier. This suggests that people are more aware of what is good for their own health and wellbeing than the medical profession is.
Which one of the following, if true, weakens this argument?
People now have easy access to websites giving information on health
The health improvements are in areas that exactly match the medical advice given by doctors
People believe that they know better than doctors how to improve their own health and wellbeing
Advances in medicine have meant that doctors give advice on a wider range of issues
Doctors prefer to give advice rather than medicationDeseleziona risposta

Over the last twenty years the number of people, including children, classed as overweight, and therefore at risk of serious health problems, has risen alarmingly. This trend could be caused by an increase in the amount people eat or by a decrease in the amount of exercise they take. Most of us exercise less than people did twenty years ago, and the average number of calories consumed per person is now less than it was twenty years ago. So the increase in the number of overweight people is clearly caused by lack of exercise. Thus the government does not need to worry about trying to change people's diets.
Which one of the following identifies the flaw in this argument?
Some individuals may have increased their calorie intake
Some people may exercise more than the average
The government may need to worry about costs to the health service
Children may use up more calories through exercise than adults
Some individuals may have health problems which cause an increase in weightDeseleziona risposta

In 2005, Peter's age was exactly four times that of his son, Quentin. In 2021, Peter will be exactly twice Quentin's age.
What is the difference between their ages?
24
20
16
28
36Deseleziona risposta

I have far too much small change in my pocket: 6 x 1c coins, 3 x 2c coins, 2 x 5c coins, 3 x 10c coins and 2 x 50c coins.
I want to buy a chocolate bar for 37c using as many coins as possible. What is the largest number of coins I can use to pay the exact price?
9
10
5
14
12Deseleziona risposta

A fishing club wishes to send out a mailing to its 1000 members. All members receive a magazine (100 g). There are 50 committee members who receive minutes (50 g). A questionnaire (75 g) will be sent to 100 members. No committee members will be sent a questionnaire. The envelope used for all mailings weighs 10 g.
The postal rates are:
 
Up to 120 g: 20c
Up to 160 g: 30c
Up to 250 g: 35c
 
What is the minimum cost of this mailing?
€ 215
€ 67
€ 230
€350
€ 220Deseleziona risposta

The general public cannot understand laws and legal documents unless they are written in clear and simple language. Therefore, the traditional style in which laws and legal documents are written must change. Citizens in a democracy must be able to understand what their legal rights and duties are.
Which one of the following best expresses the conclusion of this argument?
It is necessary in a democracy for citizens to know their legal rights and duties
Many laws and legal documents are written in old-fashioned and complicated language
The general public can fully understand only those laws and documents written in simple language
There must be a change in the style in which laws and legal documents are written
If citizens can understand laws and legal documents, they will be able to play their proper role in a democracyDeseleziona risposta

Many countries spent billions on vaccines in response to advice that a virus had the potential to kill millions. These countries are now trying to sell the stockpiles of vaccines which they do not need. There is concern that advice given by officials may have been influenced by pharmaceutical companies. Clearly, such companies would have an interest in making sure that governments spent large quantities of money on vaccines that they produced. It is essential that an investigation into this matter takes place as soon as possible so that those responsible can be held to account.
Which one of the following is an assumption on which this argument depends?
The pharmaceutical companies influenced the advice given by officials
It will not be possible for the stockpiles of vaccines to be sold
The pharmaceutical companies misjudged the dangers of the virus
The advice given by officials was not appropriate
Groups with financial interests do not advise officials in other areas of decision makingDeseleziona risposta

A chain link has the following dimensions:
 
 
 
If you join six of these links together, and stretch the chain to its full extent, what is the total length of the chain?
24
30
28
32
36Deseleziona risposta

Consider the following statements:
 
1. There are fewer rats than people
2. There are not more people than rats
3. There are at least as many rats as people
4. There are not more rats than people
 
Which two of the above statements are equivalent?
1 and 4
1 and 3
2 and 3
2 and 4
3 and 4Deseleziona risposta

In a DNA sample, the percentage of guanine present was 28%. What is the percentage of thymine in thesample?
27%
28%
44%
22%
54%Deseleziona risposta

Which property of water is most important when heat is lost from human skin?
high specific heat capacity
latent heat of vaporisation
dipole properties so salts can dissolve in sweat
boiling point of water
water density is greatest at 4°CDeseleziona risposta

What would be the chemical formula of a polysaccharide made up of five glucose monomers?
C₆H₁₂O₆
C₃₀H₆₀O₃₀
C₅H₁₀O₅
(CH_n-1O)₂
C₃₀H₅₂O₂₆Deseleziona risposta

Which of the features below may be present in both prokaryotic cells and eukaryotic animal cells?
 
1. glycogen
2. a cell wall
3. DNA in loops
4. cytoplasm containing ribosomes
 
1 and 2 only
1, 2 and 3 only
1 and 4 only
1 only
noneDeseleziona risposta

Which is likely to contain the most mitochondria?
lymphocyte (white blood cell)
red blood cell
epidermal cell
cardiac muscle cell
cheek cellDeseleziona risposta

If an animal body cell contained 36 chromosomes, which row in the table is correct?


row 1
row 2
row 3
row 4
row 5Deseleziona risposta

A food item was burned in pure oxygen and released 830 kJ of energy. An identical food item of the same mass was found to produce 8 ATP’s in respiration.
Assuming it takes 31 kJ to produce one ATP molecule, estimate the efficiency of respiration.
25%
10%
30%
45%
50%Deseleziona risposta

The statements below show three stages in glycolysis.
 
1. 2 x 3 carbon compounds
2. 6 carbon compound
3. phosphorylated 6 carbon compound
 
The correct sequence is:
2, 3, 1
1, 2, 3
3, 2, 1
1, 3, 2
2, 1, 3Deseleziona risposta

During vigorous exercise a variety of products will be generated in muscle cells. Which answer correctly lists some of the products?
water, sweat, heat and lactic acid
usable energy (ATP), carbon dioxide and oxygen
carbon dioxide, lactic acid and ethanol
water, lactic acid, heat and carbon dioxide
useable energy (ATP), heat, glycogen and carbon dioxideDeseleziona risposta

Haemophilia is caused by a recessive allele carried only on the X chromosome. A carrier female and a non-haemophiliac male decide to have a child.
Which of the following four statements are correct?
 
1. they have a 25% chance of producing a haemophiliac son
2. they have a 25% chance of producing a haemophiliac daughter
3. they have a 25% chance of producing a carrier son
4. they have a 25% chance of producing a carrier daughter
 
1 and 2 only
2 and 4 only
2 and 4 only
3 and 4 only
1 and 4 onlyDeseleziona risposta

Cross over values (COV’s) can be considered as the relative distance between genes and are used to help construct chromosome maps. Four genes, called P, Q, R and S, are found on the same chromosome. Use the following COV’s to work out the sequence of the four genes.
 
P to Q = 33 | Q to R = 8 | R to S = 15 | P to S = 10 | P to R = 25
 
The sequence of the genes is
S P Q R
P S R Q
R S P Q
Q S R P
P Q R SDeseleziona risposta

In a dihybrid cross between two heterozygous individuals, which is the most likely combination in theiroffspring?
AaBB
aaBB
AaBb
aaBb
AABBDeseleziona risposta

The base sequence of a section of DNA is shown below.
 
C A T G C A C A T C G T G C C C A A
 
The maximum number of different amino acids this section codes for is:
4
6
5
9
18Deseleziona risposta

Which of the components of DNA listed below are found on the outside of a DNA double helix?
 
1. Pentose sugar
2. Phosphate
3. Purine bases
4. Pyrimidine bases
 
3 and 4 only
1, 2 and 3 only
2, 3 and 4 only
1 and 2 only
1, 2, 3 and 4Deseleziona risposta

Which of the following organisms are subject to natural selection?
 
1. prokaryotes that reproduce asexually
2. single-celled eukaryotes that reproduce sexually
3. organisms living in a changing environment
4. organisms living in a stable environment
 
2 and 3 only
3 and 4 only
1, 2 and 3 only
1 and 2 only
1, 2, 3 and 4Deseleziona risposta

Which adaptation cannot help increase the speed of transmission in a motor neurone?
nodes of Ranvier
long axon
presence of an insulating myelin sheath
greater axon diameter
synapseDeseleziona risposta

In the process of ventilation the following occur:
 
1. pressure in thorax increases
2. volume of thorax increases
3. diaphragm goes down
4. ibcage goes down
 
Which of these occur during inhalation?
1 and 2 only
3 and 4 only
1 and 3 only
2 and 3 only
2 and 4 onlyDeseleziona risposta

Which answer correctly identifies roles of the brain and the pancreas in the normal physiological regulation of the concentration of glucose in the blood?



row 1
row 2
row 3
row 4
row 5Deseleziona risposta

Which of the following shows how the atomic radius of the elements changes on crossing from left to right in the row of the Periodic Table from potassium to bromine?



row 1
row 2
row 3
row 4
row 5Deseleziona risposta

How many nitrogen electrons are involved in bond formation in HONO₂?
4
3
5
6
7Deseleziona risposta

Which one of the following compounds can be made from ethanol using only a substitution reaction?
Ethanal
Ethanoic acid
Bromoethane
Ethoxyethane
EtheneDeseleziona risposta

An aromatic compound consists of two benzene rings joined together. Which of the following could be itsformula?
 
1. C₁₀H₈
2. C₁₀H₁₀
3. C₁₀H₁₂
4. C₁₂H₁₀
5. C₁₂H₁₂
 
2 and 4
1 and 4
3 and 4
2 and 5
3 and 5Deseleziona risposta

8.0 g of copper oxide is reduced to 5.6 g of copper using hydrogen gas.
[relative atomic mass: Cu=64,O=16]
 
CuO + H₂ → Cu + H₂O
 
What is the yield of copper as a percentage of the theoretical maximum?
87.5%
43.9%
56.0%
70.0%
14.3%Deseleziona risposta

The positions of some elements in the Periodic Table are shown below.
 

 
Which two of the elements shown react most energetically with each other?
Ne and Na
Na and Cl
C and He
Li and Br
Li and KrDeseleziona risposta

Which one of the following is not an acid/base reaction?
2NH₃ → NH₂^- + NH₄⁺
Al(H₂O)₆³⁺ + H₂O → Al(H₂O)₅(OH)²⁺ + H₃O⁺
CH₄ + H(SbF₆) → CH₅⁺ + SbF₆^-
HNO₃ + HClO₄ → H₂NO₃⁺ + ClO₄^-
FeCl₃ + 6H₂O → Fe(H₂O)₆³⁺ + 3Cl^-Deseleziona risposta

What is the total number of electrons in an ammonium ion, NH₄⁺?
9
10
8
11
12Deseleziona risposta

One group of elements in the Periodic Table contains, in descending order, boron, aluminium, gallium, indium and thallium. Which of the following are correct about these elements?
 
1. Indium forms the oxide In₂O₃
2. Boron is the least reactive element in the group
3. Gallium forms the sulphate GaSO₄
 
1 and 2
1 only
1 and 3
2 and 3
1, 2 and 3Deseleziona risposta

Sodium chloride (relative molecular mass = 58.5) has a solubility of 36.0 g per 100 g of water. The density of the solution is 1.13 g/ml. Which of the following calculations would give the solubility in moles perlitre?
36.0 x 1000 x 1.13/(58.5 x 136)
36.0 x 1000/(58.5 x 1.13)
36.0 x 10 x 1.13/58.5
36.0 x 10 x 1.13/(58.5 x 136)
36.0 x 10/58.5Deseleziona risposta

Which one of the following is not an oxidation/reduction reaction?
Cl₂ + H₂O → HCl + HClO
KClO₄ → KCl + 2O₂
2Fe + 3Cl₂ → 2 FeCl₃
NaCl + H₂SO₄ → NaHSO₄ + HCl
The electrolysis of sodium chloride solutionDeseleziona risposta

Which one of the following is not an example of simple harmonic motion?
The ripples produced when a stone is dropped into a tank of water
A weight moving up and down at the end of a spring
The motion of a ball bouncing on the floor
The motion of the Moon around the Earth as observed from Mars
A vibrating violin stringDeseleziona risposta

A uniform bar of length 2.0 m and weight 1000 N has its centre of gravity at its centre. The bar is pivoted in the position shown, and supports a weight of 200 N in the position shown in the diagram.
 

 
What weight is needed at position P to balance the bar?
800 N
1000 N
600 N
1800 N
1600 NDeseleziona risposta

Which of the following systems has an overall entropy closest to zero?
A weight moving up and down on a spring
The evaporation of ether at room temperature
An object in free fall when it has reached terminal velocity
A metal object being rapidly electroplated
A satellite in orbit 25 000 km above the EarthDeseleziona risposta

Three resistors are connected to a 20 V battery with a constant supply. One of the resistors is a variable resistor.
 

 
The resistance of the variable resistor is gradually increased from zero to 5 Ω.
Which graph shows how the current from the battery varies with the resistance (R) of the variable resistor?




Deseleziona risposta

An object of mass 50 g just floats in a liquid of density 2.5 g/ml. When the object is placed in a liquid of density 2.0 g/ml, it sinks to the bottom of the container. What is the force that the object exerts on the bottom of the container?
[ g = 10 m/s2 = 10 N/kg ]
0.4 N
10 N
40 N
0.1 N
400 NDeseleziona risposta

The law of gravitation states that the gravitational force between two bodies of mass m1 and m2 is given by:
 
 \( x = \frac{Gm1m2}{r^2}\)
 
G (gravitational constant) = 7 x10^-11 Nm² kg ^-2
r (distance between the two bodies) in the case of the Earth and Moon = 4 x 10⁸ m
m₁ (Earth) = 6 x 10²⁴ kg
m₂ (Moon) = 7 x 10²² kg
 
What is the gravitational force between the Earth and the Moon?
1.8375 x 10¹⁹ N
1.8375 x 10²⁰ N
1.8375 x 10²⁵ N
1.8375 x 10²⁶ N
1.8375 x 10²⁸ NDeseleziona risposta

David has two boxes containing shapes.
 
In box A there are 4 stars and 2 hearts
In box B there are 2 stars and 1 heart
 
David takes, at random, a shape from box A and puts it into box B. He then takes a shape from box B.
What is the probability that this shape is a star?
\(\frac{4}{9}\)
\(\frac{2}{3}\)
\(\frac{1}{12}\)
\(\frac{3}{4}\)
\(\frac{4}{3}\)Deseleziona risposta

Which of the expressions below has the largest value for 0 < x < 1?
\(\frac{1}{x}\)
\(x^2\)
\(\frac{1}{(1+x)}\)
\(\frac{1}{√x}\)
\(√x\)Deseleziona risposta

How many different integers, n, are there such that the difference between 2√n and 7 is less than 1?
2
4
6
0
8Deseleziona risposta

The graph below shows the line joining A (2,1) and B (6,3), and its perpendicular bisector (shown dashed ------------ ).
 


Which of the following is the equation of the dashed line?
y = 2x – 6
y = 2x – 10
y = 4 – x/2
y = 10 – 2x
y = 4 – 2xDeseleziona risposta

A square piece of metal has a semicircular piece cut out of it as shown. The area of the remaining metal is 100 cm².
 

 
Which of the following is a correct expression of the length of the side of the square in cm?




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