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1,904 questions JAMB 2483 WAEC 1904 NECO 322 CUSTOM 10

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1,904 questions

Question 1 of 20 1,904 total questions

Question 941

waec 1988

A transparent rectangular block 5.0cm thick is placed on a black dot. The dot when viewed from above is seem 3.0cm from the top of the block calculate the refractive index of the material of the block.

A2/5

B3/5

C3/2

D5/3

E5/2

View Explanation & Discuss

Question 942

waec 1988

Which of the following statements is/are not correct about image formed by a plane mirror?
I. The magnification produced is 1
II. The image distance is same as the object distance
III. The image is real
IV. The image is laterally inverted

AI only

BII only

CIII only

DI & II only

EII & IV only

View Explanation & Discuss

Question 943

waec 1988

Which of the following will affect the saturation vapour pressure of a liquid?

ATemperature of the liquid

BHumidity of air

CVolume of vapour

DVolume of the liquid

Emass of the liquid

View Explanation & Discuss

Question 944

waec 1988

Which of the following instrument may be used to measure the relative humidity?

AHydrometer

BBarometer

CManometer

DHypsometer

EHygrometer

View Explanation & Discuss

Question 945

waec 1988

The temperature at which the water vapour present in the air is just sufficient to saturate it is called the

Aice point

Bboiling point

Csteam point

Ddew point

Esaturation point

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Question 946

waec 1988

0.5kg of water at 10^oC is completely converted to ice by extracting 188000J of heat from it. If the specific heat capacity of water is 4200J kg^-1C^-1, calculate the specific latent heat of fusion of ice.

A9.0 KJ kg^-1

B84.0 KJ kg^-1

C168.0 KJ kg^-1

D334.0 KJ kg^-1

E336.0 KJ kg^-1

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Question 947

waec 1988

Which of the following statements about radiant heat is/are not correct?
I. radiant heat cannot travel through a vacuum
II. rough surfaces emit radiant heat more than polished surfaces
III. Dark surfaces absorb radiant heat more than bright surfaces

AI only

BII only

CIII only

DI & II only

EII & III only

View Explanation & Discuss

Question 948

waec 1988

Which of the following best explains a person suffers more severe burns when his skin is exposed to steam than when boiling water is poured onto his skin?

Asteam is at a higher temperature than boiling water

Bsteam posses greater heat energy per unit-mass than boiling water

Csteam spreads more easily over a wider area of the skin than boiling water

Dsteam panetrates more easily over a wider area of the skin than boiling water

Ethe specific latent heat of vaporization is released in changing from boiling water to steam

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Question 949

waec 1988

In which of the following is the expansion of solids a disadvantage?

Athe fitting of wheels in rims

Bfire alarms

Cthe thermostat

Dthe bimatellic thermometer

Ethe balance wheel of a watch

View Explanation & Discuss

Question 950

waec 1988

Which of the following is a reason why a concrete floor feels colder to the bare feet than a mat on the same floor during the rainy season?

AA mat if s better conductor of heat than the feet

BMat losses heat to the bare feet at a faster rate than concrete floor

CMat losses heat to the bare feet while the concrete floor extracts heat from them

DConcrete floor is a better conductor of heat than the mat

EMat is a better conductor of heat than the floor

View Explanation & Discuss

Question 951

waec 1988

A given mass of gas has a pressure of 80Nm^-2 at a temperature of 47^oC. If the temperature is reduced to 27^oC with the volume remaining constant, the new pressure is

A46.0 Nm^-2

B75.0 Nm^-2

C80.0 Nm^-2

D85.3 Nm^-2

E139.4 Nm^-2

View Explanation & Discuss

Question 952

waec 1988

The clinical thermometer is characterized by having a

Awide range of temperature

Bwide bore

Clong stem

Dconstriction

Enarrow bore

View Explanation & Discuss

Question 953

waec 1988

Which of the following cannot be used to measure the temperature of a substance?

Avariation of pressure with temperature

Bexpansivity of a liquid

Cchange in resistance of a conductor

Dthermometric effect

Echange in color with temperature

View Explanation & Discuss

Question 954

waec 1988

Which of the following statements about the gaseous state of matter is not correct? The molecules of a substance is in gaseous state

Aare in constant state of motion

Bhave different speed

Chave a temperature which is an average measure of the kinetic energy

Dhave no intermolecular attractive force

Ehave a pressure which is determined by the number of molecules present

View Explanation & Discuss

Question 955

waec 1988

The motion of a body is simple harmonic if the

AAcceleration is always directed towards a fixed point

Bpath of motion is a striaght line

CAcceleration is directed towards a fixed point and proportional to its distance from the point

DAcceleration is proportional to the square of the distance from a fixed point

EAcceleration is constant and directed towards a fixed point

View Explanation & Discuss

Question 956

waec 1988

Which of the following correctly gives the relationship between linear speed V and angular speed ω of a body moving uniformly in a circle of radius r?

AV = ωr

BV = ω²r

CV = ωr²

DV² = ωr

EV = ω/r

View Explanation & Discuss

Question 957

waec 1988

A ball is thrown vertically upwards from the ground with an initial velocity of 50ms^-1. What is the total time spent by the ball in the air? (g = 10ms^-2)

A2.5s

B5.0s

C10.0s

D15.0s

E20.0s

View Explanation & Discuss

Question 958

waec 1988

A catapult is used to project a stone. Which of the following energy conversions takes place as the stone is released?

AThe kinetic energy of the stone is converted into gravitational potential energy

BThe gravitational potential energy of the catapult is converted into kinetic energy of the stone

CThe gravitational potential energy is converted into elastic potential energy

DThe elastic potential energy of the catapult is converted into gravitational potential energy of the stone

ENone of the above

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Question 959

waec 1988

A body is projected into space with an initial velocity V0 at an angle, θ to the horizontal. Which of the following statements is/are correct about its motion?
I. The total time of flight is (V0 Cosθ)/g.
II. The maximum height is (V0 Sin 2θ)/2g.
III. The range is (V02 Cos2θ)/g.

AI & II only

BI & III only

CII & III only

DII only

EIII only

View Explanation & Discuss

Question 960

waec 1988

A ball of mass 0.5kg moving at 10ms^-1 collides with another ball of equal mass at rest. If the two balls move off together after the impact, calculate their common velocity.

A0.2ms^-1

B0.5ms^-1

C5.0ms^-1

D10.0ms^-1

E20.0ms^-1

View Explanation & Discuss

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