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4,719 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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4,719 questions

Question 1 of 20 4,719 total questions

Question 681

waec 2014

A transverse wave can be distinguished from a longitudinal wave by

Adiffraction

Brelection

Crefraction

Dpolarization

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Question 682

waec 2014

The quality of a note depends on its

Afrequency

Bpitch

Covertones

Damplitude

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Question 683

waec 2014

A car traveling at 30ms\(^{-1}\) overcomes a frictional resistance of 100N while moving. Calculate the power developed by the engine. [1 hp = 0.75 kW]

A0.23hp

B0.40hp

C4.00hp

D4.40hp

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Question 684

waec 2014

The mass of an empty density bottle is 30g. When filled with a liquid, the mass of the bottle and the liquid is 40g. On heating the filled bottle through 40ºc, the mass reduces to 38g. Calculate the apparent cubic expansivity of the liquid

A6.25 x 10K^-1

B6.25 x 10^-3K^-1

C2.50 x 10^-3K^-1

D2.50 x 10^-4K^-1

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Question 685

waec 2014

A quantity of water at 20^oC is mixed with another quantity of water at 70^oC. The final steady temperature of the mixture is 40^oC. Determine the ratio of the mass of the cold water to that of the hot water

A7:2

B3:2

C2:5

D1:2

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Question 686

waec 2014

A body of mass M kg rests on a plane inclined at an angle \(\theta\) to the horizontal. The component of the weight of the body parallel to the plane is

AMg sin \(\theta\)

BMg cos \(\theta\)

CMg tan \(\theta\)

DMg sec \(\theta\)

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Question 687

waec 2014

Which of the following types of thermometers can be used to measure a range of temperature from -50°C to 50°? i. Clinical ii. Mercury iii. Alcohol-in-glass

Ai only

Bii only

Ciii only

Di and ii only

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Question 688

waec 2014

The change of state from solid to liquid occurs

Aat constant temperature

Bwhen temperature is lower than the boiling point

Cwhen temperature is just near freezing point

Dwhen temperature is equal to the boiling point

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Question 689

waec 2014

The temperature at which the water vapor in the air saturates the air and begins to condense is known as

Adew point

Bcritical point

Cboiling point

Dtriple point

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Question 690

waec 2014

Heat transfer by conduction is similar to wave motion because

Athere is increase in temperature

Btransfer of materials is involved

Ccharged particles vibrates at right angles

Dno transfer of materials is involved

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Question 691

waec 2014

A screw-jack has the distance between its successive threads as P and the length of its tommy bar as r. Its velocity ratio is given by the expression

A\(\frac{2 \pi r^2}{P}\)

B\(\frac{2 \pi r}{P}\)

C\(\frac{2 \pi}{rp}\)

D\(\frac{P}{2 \pi r}\)

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Question 692

waec 2014

The S.I unit of power is

BPa

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Question 693

waec 2014

A device that converts mechanical energy into electrical energy is

Aa dynamo

Ban electric motor

Can induction coil

Da transformer

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Question 694

waec 2014

Alcohol of mass 21g and density 0.7g cm^-3 is mixed with 10g of water. Determine the density of the mixture [density of water = 1.0gcm^-3]

A0.775gcm^-3

B0.875gcm^-3

C0.780gcm^-3

D0.880gcm^-3

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Question 695

waec 2014

The period of a simple pendulum X is 5s. What is the period of a simple pendulum Y which makes 50 vibrations in the same time it takes X to make 20 vibrations?

A12.5s

B2.5s

C2.0s

D1.2s

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Question 696

waec 2014

The diagram above illustrates a uniform metre rule which is balanced on a pivot by some masses. Calculate the value of M

A500.0g

B400.0g

C44.4g

D25.0g

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Question 697

waec 2014

A car starts from rest and covers a distance of 40m in 10s. Calculate the magnitude of its acceleration

A0.25ms^-2

B0.80ms^-2

C3.20ms^-2

D4.00ms^-2

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Question 698

waec 2014

A body is projected vertically upwards with a speed of 10 ms^-1 from a point 2m above the ground. Calculate the total time taken for the body to reach the ground. [g = 10ms^-2]

A1.00s

B2.00s

C2.18s

D3.00s

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Question 699

waec 2014

The knowledge of surface tension is applied in the following areas except in

Amanufacturing of rain coats

Bproduction of palm oil

Cfloating of a needle on water

Dwashing of plates with soapy water

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Question 700

waec 2014

Which of the following pairs of physical quantities is made up of vectors?

Aspeed and displacement

Bmass and force

Cdislacement and acceleration

Dmomentum and length

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