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98 questions

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Question 41

jamb 1988

A note is called an octave of another note when

Aits frequency is twice that of the first note

Bits frequency is half of the first note

Cthe notes have the same fundamental frequency

Dits periodic time is twice that of the first note

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Question 42

jamb 1988

A piano wire 0.5m long has a total mass of 0.01kg and is stretched with a tension of 800N. Calculate the frequency of the wire when it sounds its fundamental note

A200Hz

B100Hz

C4Hz

D2Hz

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Question 43

jamb 1988

Which of the following properties is/are common to all waves? i. Diffraction ii. Refraction iii. Interference

Ai only

Bii only

Cii and iii

Di, ii, and iii

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Question 44

jamb 1988

Which of the following media allow the transmission of sound wave through them i. Air. ii. Liquids. iii. Solids.

Ai and ii only

Bi and iii only

Cii and iii only

Di,ii and iii

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Question 45

jamb 1988

When heat is applied to one end of a metal rod, the molecules at the other end soon begin to vibrate with greater amplitude than before because heat has been transferred by

Aradiation

Bconvection

Cconduction

Devaporation

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Question 46

jamb 1988

A tap supplies water at 25^oC while another supplies water at 75^oC. If a man wishes to bathe with water at 40^oC, the ratio of the mass of cold water to the mass of hot water required is

A1 : 3

B15 : 8

C7 : 3

D3 : 1

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Question 47

jamb 1988

The amount of heat needed to raise the temperature of 10kg of copper by 1k is its

Aspecific heat capacity

Bheat capacity

Clatent heat

Dinternal energy

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Question 48

jamb 1988

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

Aforce

Bpower

Cenergy

Daccelaration

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Question 49

jamb 1988

A body whose mass is 2kg and has a volume of 500cm3 just floats when completely immersed in a liquid. Calculate the density of the liquid

A4.0 x 10²kgm^-3

B4.0 x 10³kgm^-3

C1.0 x 10³kgm^-3

D1.0 x 10⁶kgm^-3

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Question 50

jamb 1988

A force, 10N, drags a mass 10kg on a horizontal table with an acceleration of 0.2ms. If the acceleration due to gravity is 10ms-1, the coefficient of friction between the moving mass and the table is

A0.02

B0.08

C0.20

D0.80

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Question 51

jamb 1988

How long will it take a 60kg man to climb a height of 22m if he expended energy at a rate of 0.25kW. [g = ms^-2]

A5.3s

B34.5s

C41.6s

D52.8s

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Question 52

jamb 1988

A 20-toothed gear wheel drives a 60-toothed one. If the angular speed of the smaller wheel is 120 rev s^-1, the angular speed of the larger wheel is

A3 rev s^-1

B40 rev s^-1

C360 rev s^-1

D2400 rev s^-1

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Question 53

jamb 1988

A particle starts from rest and moves with a constant acceleration of 0.5ms\(^{-2}\). The distance covered by the particle in 10s is?

A2.5m

B5.0m

C25.0m

D50.0m

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Question 54

jamb 1988

When taking a penalty kick, a footballer applies a force of 30.0N for a period of 0.05s. if the mass of the ball is 0.075kg, calculate the speed with which the ball moves off.

A4.50ms^-1

B11.25ms^-1

C20.00ms^-1

D45.00ms^-1

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Question 55

jamb 1988

Which of the following quantities are scalars? i. Electrical potential ii. Torque iii. Momentum iv. Kinetic energy

Aii and iii only

Bi and ii only

Ciii and iv only

Di and iv only

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Question 56

jamb 1988

Two forces whose resultant is 100N, are at right angle to each other. If one of them makes an angle 30^o with the resultant, determine its magnitude.

A8.66N

B50.0N

C57.7N

D86.6N

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Question 57

jamb 1988

A lorry travels 10km northwards, 4km eastwards, 6km southwards, 4km westwards to arrive at a point T. What is the total displacement?

A6km south

B4km north

C6km north

D4km east

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Question 58

jamb 1988

Which of the following are the correct SI units of the quantities indicated? i.N(Force) II. N/m (Torque) iii. watt(Power) iv. kgms-2(Momentum)

Ai and ii only

Bi, ii and iii only

Ci, ii, and iv only

Di and iii only

View Explanation & Discuss

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