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Physics
WAEC / WASSCE 2009
Mechanics and Properties of Matter
Solution
A body of mass 5kg movimg with a velocity of 30ms-1 due east is suddenly hit by another body and changes its velocity to 50ms-1 in the same direction. Calculate the magnitude of the impulse received.
A
100Ns
B
150Ns
C
250Ns
D
400Ns
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
I = Ft = m(v - u)
= 5(50 - 30) = 100
Source: Myschool Past Questions Archive (Record #35161)
Physics
WAEC / WASSCE 2009
Mechanics and Properties of Matter
Electric energy is measured in
A
ampere
B
coulomb
C
kilowatt-hour
D
kilowatt
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #35162)
Physics
WAEC / WASSCE 2009
Mechanics and Properties of Matter
Solution
A stone of mass 0.5kg is dropped from a height of 12m. Calculate its maximum kinetic energy. [g = 10ms-1]
A
3.0J
B
6.0J
C
30.0j
D
60.0J
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
K.E = P.E = mgh
= 0.5 x 10 x 12 = 60J
Source: Myschool Past Questions Archive (Record #35164)
Physics
WAEC / WASSCE 2009
Mechanics and Properties of Matter
Solution
A machine of efficiency 80% is used to lift a box. If the effort applied by the machine is twice the weight of the box. Calculate the velocity ratio of the machine
A
0.50
B
0.63
C
0.80
D
1.60
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
Y = \(\frac{M.A}{V.R} \times \frac{100}{1}\)
= \(\frac{\frac{1}{2}}{V.R} \times \frac{100}{1}\)
V.R = 0.625
Source: Myschool Past Questions Archive (Record #35169)
Physics
WAEC / WASSCE 2009
Thermal Physics
Solution
A faulty thermometer registers 102.5oC t 100oC. If the thermometer has no zero hour, what will it register at 55oC?
A
54.6oC
B
55.0oC
C
56.0oC
D
56.4oC
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
x = \(\frac{102.5 \times 55}{100}\)
= 56.375oC
Source: Myschool Past Questions Archive (Record #35171)
Physics
WAEC / WASSCE 2009
Thermal Physics
Solution
A rod of initial lenght 2m at a temperature of 25oC is heated to 80oC. Calculate the increase in length of the rod if its linear expansivity is 4.0 x 10-3K-1
A
0.26m
B
0.44m
C
0.53m
D
0.84m
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
\(l_2 - l_1 = \alpha l_1 (\theta_2 - \theta_1) = 4.0 \times 10^{-3} \times 2(80 - 25)\)
= 0.44m
Source: Myschool Past Questions Archive (Record #35176)
Physics
WAEC / WASSCE 2009
Mechanics and Properties of Matter
as a bicycle Tyre was being pumped up, it was noticed that contrary to Boyle's law the volume increased as the pressure increased. The best explanation of this is that Boyle's law is only true for
A
ideal gases
B
a fixed mass of gas
C
a mixture of gases
D
a gas at variable temperature
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #35179)
Physics
WAEC / WASSCE 2009
Electricity and Magnetism
It takes 4 minutes to boil a quantity of water using an electrical heating coil. How long will it take to boil the same quantity of water using the same coil if the current is doubled? [Neglect any external heat losses]
A
8 minutes
B
4 minutes
C
2 minutes
D
1 minute
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option C.
Source: Myschool Past Questions Archive (Record #35182)
Physics
WAEC / WASSCE 2009
Heat Energy & Temperature
When table salt is added to ice, the melting point of the ice
A
is raised
B
is lowered
C
remains unchanged
D
is first raised, then lowered
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #35187)
Physics
WAEC / WASSCE 2009
Heat Energy & Temperature
Which of the following is used to measure relative humidity?
A
hydrometer
B
barometer
C
hypsometer
D
hygrometer
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #35188)
Physics
WAEC / WASSCE 2009
Thermal Physics
Which of the following factors affect the rate of evaporation of a liquid? i. Exposed surface area ii Temperature of the surroundings iii. Thermal capacity of the liquid iv. Relative humidity of the surroundings
A
ii and iii only
B
ii, iii and iv only
C
i, iii and iv only
D
i, ii amd iv only
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option D.
Source: Myschool Past Questions Archive (Record #35189)
Physics
WAEC / WASSCE 2009
Heat Energy & Temperature
The maximum displacement of a vibrating tunning fork is its
A
amplitude
B
frequency
C
period
D
wavelength
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #35190)
Physics
WAEC / WASSCE 2009
Waves and Optics
Solution
A boat is rocked by waves of speed 30ms-1 whose successive crest are 10m apart. Calculate the rate at which the boat recieves the waves
A
30s-1
B
10s-1
C
3s-1
D
1s-1
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
F = \(\frac{v}{\lambda} = \frac{30}{10} = 3s^{-1}\)
Source: Myschool Past Questions Archive (Record #35191)
Physics
WAEC / WASSCE 2009
Waves and Optics
Which of the following waves is not transverse
A
light waves
B
sound waves
C
sea waves
D
radio waves
medium Difficulty
Verified Correct Answer: Option B
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option B.
Source: Myschool Past Questions Archive (Record #35192)
Physics
WAEC / WASSCE 2009
Waves and Optics
Light travelling through a small pinhole usually does not make a shadow with a distinct sharp edge because of
A
diffraction
B
inteference
C
reflection
D
refraction
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #35193)