The diagram given illustrates a wave form. Determine the speed of the wave
A5.4 ms-1
B8.4 ms-1
C9.6 ms-1
D10.0 ms-1
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Question 263
waec2015
The pressure applied to an enclosed fluid to one end id transmitted equally throughout the fluid and to the container walls. This statement is
AArchimede's principle
BBernoulli's principle
CPascal's principle Heisenberg's
DHeisenberg's uncertainty principle
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Question 264
waec2015
Which of the following units is the S.I. unit of heat capacity?
AJkg-1
BJkg-1 K-1
CJK-1
DJg-1K-1
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Question 265
waec2015
Which of the following concepts is a method of heat transfer that does not require a material medium?
Aconduction
Bradiation
Cdiffusion
Dconvection
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Question 266
waec2015
In an experiment in which a molten substance is allowed to cool, the cooling curve above was obtained. The temperature 60oC is known as the
Avaporization point
Bcooling temperature
Cboiling point
Dmelting point
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Question 267
waec2015
In an experiment in which a molten substance is allowed to cool, the cooling curve above was obtained. The temperature 60oC is known as the
Avaporization point
Bcooling temperature
Cboiling point
Dmelting point
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Question 268
waec2015
A battery of emf 24V is connected to three resistor P, Q and R as illustrated in the diagram. Determine the voltage across the resistor Q
A5v
B10v
C14v
D24v
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Question 269
waec2015
A quantity of hot water at 100oC is added to 400g of water at 10oC until the temperature of the mixture is 60oC.
Calculate the mass of the hot water added. [Specific heat capacity of water =4200JKg-1 K-1]
A200g
B320g
C400g
D500g
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Question 270
waec2015
The diagram above illustrates a block ans tackle pulley system in which an effort E supports a load of 100.0N. If the efficiency of the machine is 75%, calculate the value of E
A22.2N
B38.0N
C67.0N
D75.0N
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Question 271
waec2015
Water is unsuitable for use as a thermometric liquid because it
Aexpands unevenly between 0oC and 40oC
Bhas narrow temperature range
Chas a concave meniscus
Dmaintains a fixed density
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Question 272
waec2015
The crackling noise produced by aluminum roofing sheets on a house during a hot sunny day is a result of
Athermal equilibrium of the sheets
Bconduction of heat by the sheets
Ccontraction of the sheets
Dexpansion of the sheets
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Question 273
waec2015
A body of mass 1000kg is released from a height of 10m above the ground. Determine its kinetic energy just before it strikes the ground .[g = 10ms-2]
A10J
B103J
C104J
D105J
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Question 274
waec2015
A uniform bar AB is balanced on a knife-edge which is 60cm from B by a mass of 22g which hangs at C 10cm from A. Calculate the mass of the bar.
A133.2g
B66.0g
C60.0g
D22.0g
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Question 275
waec2015
A bullet fired vertically upwards reaches a height of 500m. Neglecting air resistance, calculate the magnitude of the initial velocity of the bullet. [g = 10ms-2]
A500.0ms-1
B100.0ms-1
C70.0ms-1
D50.0ms-1
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Question 276
waec2015
Two strings each inclined at an angle 30o to the horizontal are used to hold a bucket of water weighing 20N. Calculate the tension i n each string.
A20 (\sqrt{3}\)N
B20N
C10 (\sqrt{3}\)N
D10N
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Question 277
waec2015
In a school compound a girl walks 40m due east from the laboratory to the staff room to submit her report. Then she returns and walks 30m due north to her classroom. Determine the magnitude of her displacement from the10m laboratory
A10m
B35m
C50m
D70m
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Question 278
waec2015
Which of the following statements describes a body in a stable equilibrium correctly?
Aa person walking on a tight-rope
Bball on a smooth horizontal table
Cball resting on an inverted hemisphere bowl
Dball in the middle of a nemispherical bowl
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Question 279
waec2015
A body is projected with an initial velocity U at an angle O to the horizontal. The time taken by it to reach its maximum height is given by the expression
A\(\frac{2u \text{sin}\theta}{g}\)
B\(\frac{u^2 \text{sin}^2\theta}{2g}\)
C\(\frac{u \text{sin}\theta}{g}\)
D\(\frac{u \text{sin}\theta}{2g}\)
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Question 280
waec2015
The slope of a straight-line velocity-time graph represents
