A slinky spring fixed at one end is placed horizontally on a table. The free end is displaced parallel to the table and then released. The resultimg wavelength is
Atransverse
Blongitudinal
Cstationary
Delectromagnetic
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Question 1372
waec2002
What type of motion does the skin of a 'talking' drum perform when it is struck with a drum stick?
ARandom
BRational
CTranslational
Dvibratory
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Question 1373
waec2002
Calculate the energy required to vapourise 50g of water initially at 80oC.[specific heat capacity of water = 4.2Jg-1K-1][specific latent heat of vaporisation of water = 2260Jg-1]
A113,000J
B117,200J
C234,400J
D420,000J
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Question 1374
waec2002
Water of mass 120g at 50oC is added to 200g of water at 10oC and the mixture is well stirred. Calculate the temperature of the mixture. [Neglect heat losses to the surrounding]
A60oC
B40oC
C25oC
D10oC
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Question 1375
waec2002
The silver coating on the inside of a vacuum flask reduces heat loss by
Aconduction
Bradiation
Ccondensation
Dconvention
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Question 1376
waec2002
The ice and steam points of a certain thermometer are -20° and 100° respectively. Calculate the Celsius temperature corresponding to 70° on the thermometer
A84.0o
B75.0o
C64.0o
D58.0o
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Question 1377
waec2002
Which of the following actions will improve the efficiency of the pulley system?
Areducing the mass of the pulley
Bincreasing the friction force between the string and the pulley
Cincreasing the mass per unit length of the string of the pulley
Dincreasing the mass of the pulley
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Question 1378
waec2002
A block and tackle system has 6 pulleys. If the efficiency of the machine is 60%, determine its mechanical advantages
A12.0
B10.0
C3.6
D1.8
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Question 1379
waec2002
a load of mass120kg is raised vertically through a height of 2m in 30s by a machine whose efficiency is 100%. Calculate the power generated by the machine. [g = 10ms-2]
A60W
B80W
C100W
D120W
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Question 1380
waec2002
Which of the following statements correctly defines quantitatively the work done by a force? the product of the force and the distance moved
Aparallel to the line of action of the force from a reference point
Bperpendicular to the line of action of the force from a reference point
Con a line through the reference point
Dby the object
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Question 1381
waec2002
In the diagram above, AB represents a uniform rod of length 1.50m which is in equilibrium on a pivot at P, If AP = 40cm, calculate the mass of the rod. [g = 10ms-2]
A0.280kg
B0.400kg
C0.613kg
D0.800kg
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Question 1382
waec2002
A spiral spring of natural length 30.0cm and force constant of 20Nm-1 is compressed to 20.0cm. Calculate the energy stored in the spring
A0.1J
B1.0J
C10.0J
D100.0J
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Question 1383
waec2002
An object A is held in equilibrium as illustrated in the diagram above. Using the data on the diagram determine the magnitude, W of the weight of
A23N
B17N
C7N
D5N
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Question 1384
waec2002
An object is acted upon by a system of parallel forces causing the object to be in static equilibrium. Which of the following statements is not correct?
AThe resultant of the parallel force is zero
Bthe algebraic sum of the moment of the forces is zero
Call the parallel forces must be equal in magnitude and in direction
Dthe sum of the forces in one direction must be equal to the sum of forces in the opposite direction
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Question 1385
waec2002
An object is released from rest at a height of 25m. Calculate the time it takes to fall to the ground. [g = 10ms-2]
A25.00s
B10.00s
C2.50s
D2.24s
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Question 1386
waec2002
A car takes off from rest and covers a distance of 80m on a straight road in 10s. Calculate the magnitude of its acceleration
A1.25ms-2
B1.60ms-2
C4.00ms-2
D8.00ms-2
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Question 1387
waec2002
A man was moving round a circular path continuously for 4 minutes and covered the following distances in the times stated :
Distance (in metres) 200, 400, 600, 300
Time(in minutes) : 1, 2, 3, 4 respectively. Which of the following statements is correct about the motion of the man?
Athe man was moving without uniform velocity
Bthe speed was changing constantly
Cthe velocity was uniform
Dit was an instance of motion in which both speed and velocity are the same
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Question 1388
waec2002
The magnitude of the force required to make an object of mass, m move with speed, v in a circular of radius r is given by the expression
A\(\frac{mr}{v}\)
B\(\frac{mr^2}{v}\)
C\(\frac{mv^2}{r}\)
D\(\frac{mv}{r^2}\)
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Question 1389
waec2002
A boy travels 8 km eastward to a point B and then 6km northward to another point C. Determine the difference between the magnitude of displacement of the boy and distance travelled by him
A2.0km
B4.0km
C10.0km
D13.0km
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Question 1390
waec2002
One common characteristics of solids, liquids and gasses is that?
Aall the three has fixed volume
Btheir molecule have the same size
Ctheir molecules are always in motion
Dall the three have the same inter molecular forces
