The bob of a single pendulum has a mass of 0.02kg. Determine the weight of the bob [g = 10ms-2]
A0.02N
B0.20N
C20.00N
D200.00N
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Question 532
waec2004
A force acting on a body causes a change in the momentum of the body from 12kg ms-1 to 16kg ms-1 in 0.2s. calculate the magnitude of the force
A140.0N
B20.0N
C4.0N
D0.8N
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Question 533
waec2004
A body of mass 8kg moving with a speed of 30ms-1 is brought to rest in 2.5s by a constant retarding force. Calculate the magnitude of the force
A240N
B96N
C20N
D9N
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Question 534
waec2004
A body is dropped from a certain height above the ground level, falls with uniform
Aspeed
Bvelocity
Cacceleration
Dretardation
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Question 535
waec2004
A body is said to be moving with uniform acceleration if it experiences equal
Aincrease in velocity at equal time intervals
Bdecreases in velocity at equal time intervals
Cincreases in speed at equal time intervals
Ddecreases in speed at equal time intervals
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Question 536
waec2004
The speed of an object in rectilinear motion can be determine from the
Aarea under a velocity-time graph
Barea under a distance-time graph
Cslope of a distance-time graph
Dslope of a velocity-time graph
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Question 537
waec2004
A machine of velocity ratio 5 is used in lifting a load with an effort of 500N. If the machine is 80% efficient. Determine the magnitude of load
A2500N
B2000N
C900N
D625N
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Question 538
waec2004
An elastic string of force constant 200N m-1 is stretched through 0.8m within its elastic limit. Calculate the energy stored in the string
A64.0J
B80.0J
C128.0J
D160.0J
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Question 539
waec2004
On which of the following factor does the viscosity of a liquid depend? i. Nature of the liquid. ii. Temperature of the liquid. iii. Area of the liquid surface
Ai and ii only
Bii and iii only
Ci and iii only
Di, ii and iii
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Question 540
waec2004
A steel needle floating on water, sinks when kerosine is added to the water. This is because the kerosine
Aincreased the surface tension of the water
Breduces the density of the water
Creduces the surface tension of the water
Dreduces the upthrust on the needle
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Question 541
waec2004
A diver is 5.2m below the surface of water of density 1000Kgm-3. If the atmospheric pressure is 1.02 x 105pa. Calculate the pressure on the diver [g = 10ms-2]
A6.20 x 104 pa
B1.02 x 105 pa
C1.54 x 105 pa
D5.20 x 105 pa
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Question 542
waec2004
Which of the following concept is not an evidence of the particle nature of matter?
Adiffusion
Bbrownian motion
Cdiffraction
Dcrystallization
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Question 543
waec2004
The diagram above represent displacement D, versus time, t graph of a progressive wave. Deduce the frequency of the wave
A20 Hz
B10 Hz
C5 Hz
D4 Hz
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Question 544
waec2004
Calculate the change in volume when 90g of ice is completely melted. [density of water = 1g cm-3, density of ice = 0.9cm-3]
A0.00cm3
B9.00cm3
C10.00cm3
D90.00cm3
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Question 545
waec2004
An object weighs 60.0N in air, 48.2N in a certain liquid X, and 44.9N in water, Calculate the relative density of X
A3.300
B1.279
C0.932
D0.782
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Question 546
waec2004
Which of the following statements about the mass and the weight of a body is not correct? its
Amass is a scalar quantity
Bweight is a function of the gravitational pull on it
Cmass on earth and on the moon is the same
Dweigh at the equatior and at the poles is the same
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Question 547
waec2004
The molecular structure of a liquid is such that
Athe molecules have unlimited freedom of movement
Bmolecular movement is restricted to vibration only
Cintermolecular collisions take place
Dall molecules moves move with the same speed
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Question 548
waec2003
The bar magnet illustrated in the diagram above picks up an unmagnetised steel nail X. In turn, X picks up a similar nail Y and so on. The nail are said to be magnetised by
Aconduction
Bsingle touch
Cinduction
Ddivided touch
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Question 549
waec2003
The diagram above shows the resultant electric field pattern due to two electric point charges P and S. Which of the following statements is correct?
AP is negatively charged while S is positively charged
BP is positively charged while S is negatively charged
Cboth P and S are positively charge
Dboth P and Q are negatively charged
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Question 550
waec2003
Which of the following reactions represents nuclear fusion?
