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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 1951

waec 1991

a tap supplies water at 26^oC while another supplies water at 82^oC. If a man wishes to bathe with water at 40^oC the ratio of hot mass of hot water to that of cold water required is

A1:3

B3:1

C3:7

D7:3

E15:8

View Explanation & Discuss

Question 1952

waec 1991

A team trap is a component of the apparatus used in determining the specific latent heat of vaporisation of steam. In the steady steady state, the steam trap

Astores the steam for future use

Bprevents the steam from escaping

Censures that only dry steam gets into the calorimeter

Dallows condensed steam to go into the calorimeter

Edetermine the quantity of steam used

View Explanation & Discuss

Question 1953

waec 1991

The boiling point of a liquid depends on the following except the

Anature of the liquid

Bexternal pressure

Cvolume of the liquid

Dimpurities present in the liquid

Edegree of it's molecular cohesive force

View Explanation & Discuss

Question 1954

waec 1991

A fixed mass of gas of volume 600cm³ at a temperature of 27^oC is cooled at constant pressure to a temperature of 0^oC. What is the change in volume?

A54cm²

B273cm²

C300cm²

D546cm²

E600cm²

View Explanation & Discuss

Question 1955

waec 1991

The set-up illustrated above shows a capillary tube of uniform cross-sectional area in two different arrangements. Using the data in the diagrams. Calculate the pressure of the atmosphere

A76cm of Hg

B75cm of Hg

C74cm of Hg

D60cm of Hg

E45cm of Hg

View Explanation & Discuss

Question 1956

waec 1991

A water fall is 420m high. Calculate the difference in temperature of the water between the top and bottom of the water fall. Neglect heat loses(g = 10.0m-2 specific heat capacity of water = 4.20 x 10\(^3\) JKg-1 K-1)

A0.1^oC

B1.0^oC

C42^oC

D100^oC

E4.20^oC

View Explanation & Discuss

Question 1957

waec 1991

A wire, 20m long is heated from a temperature of 5oC to 55oC. If the change in length is 0.020m, calculate the linear expansivity of the wire

A1.0 x 10^-3k^-1

B2.0 x 10^-4k^-1

C2.0 x 10^-5k^-1

D1.0 x 10^-5k^-1

E2.0 x 10^-6k^-1

View Explanation & Discuss

Question 1958

waec 1991

The diagram above represents six maximum and minimum thermometer. If the temperature of the surrounding falls, which of the following correctly states how the thermometer would respond to the change in temperature?

AS₁, would move upward but S₂ would not move

BS₁ would not move but S₂ would move upwards

Cboth S₁ and S₂ would move upwards

DS₁ would move downwards and S₂ would move downwardw

ES₁ would move downwards and S₂ wouldnmove downwards

View Explanation & Discuss

Question 1959

waec 1991

A boatman facing north wants to cross a flowing river to a point directly opposite its position at the other bank. If the river is flowing eastwards, in what direction should he row his boat?

Awest

Beast

Cnorth-west

Dnorth-east

Esouth-west

View Explanation & Discuss

Question 1960

waec 1991

The diagram represents a block-and-tackle pulley system on which an effort of 50N is just able to lift a load of weight W. If the efficiency of the machine is 40%. find the value of W

A300N

B200N

C140N

D120N

E20N

View Explanation & Discuss

Question 1961

waec 1991

The product PV where P is pressure and V is volume has the same unit as

Apower

Bwork

Cacceleration

Dimpulse

Eforce

View Explanation & Discuss

Question 1962

waec 1991

power is defined as the

Acapacity to exert a force

Bproduct of force and time

Cproduct of force and distance

Dability to do work

Eenergy expended per unit time

View Explanation & Discuss

Question 1963

waec 1991

An orange fruit drops to the ground from the top of a tree 45m tall. How long does it takes to reach the ground? (g = 10ms^-2)

A3.0s

B4.5s

C6.0s

D7.5s

E9.0s

View Explanation & Discuss

Question 1964

waec 1991

the diagram above shows the position of a simple pendulum set in motion. At which of the positions does the pendulum have maximum kinetic energy?

View Explanation & Discuss

Question 1965

waec 1991

A body moving with uniform acceleration has two points(5, 15) and (20, 60) on the velocity-times graph of its motion. Calculate the acceleration of the body

A0.25ms^-2

B3.00ms^-2

C4.00ms^-2

D9.00ms^-2

E16.00ms^-2

View Explanation & Discuss

Question 1966

waec 1991

A ball is projected horizontally from the top of a hill with a velocity of 20m^-1. If it reaches the ground 4 seconds later, what is the height of the hill? (g = 10ms^-2)

A20m

B40m

C80m

D160m

E200m

View Explanation & Discuss

Question 1967

waec 1991

A body moves with a constant speed but has an acceleration. this process if it

Amoves in a straight line

Bmoves in a circle

Cis oscillating

Dis in equilibrum

Ehas a varrying acceleration

View Explanation & Discuss

Question 1968

waec 1991

Which of the following is a fundamental quantity?

Aspeed

Bdensity

Clenght

Dimpulse

Eenergy

View Explanation & Discuss

Question 1969

jamb 1991

In the above circuit, The fuse wire melts when

AK is Opened

BK is closed

Cthe 14 ohm resistor is doubled with k closed

Dthe 6 ohm resistor is doubled with k closed

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Question 1970

jamb 1991

The net capacitance of the circuit shown above is

A8.0µF

B6.0µF

C4.0µF

D2.0µF

View Explanation & Discuss

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