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Physics
UTME / JAMB 1987
Heat Energy & Temperature
Solution
A man walks 8km north and then 5km in a direction 60o east of north. Find the distance from his starting point
A
11.36km
B
12.36km
C
13.00km
D
14.36km
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
R = \(\sqrt {5^2 + 8^2 - 2 \times 5 \times 8 \times cos 120^o}\)
R = \(\sqrt{129}\)
= 11.36km
Source: Myschool Past Questions Archive (Record #28402)
Physics
UTME / JAMB 1987
Heat Energy & Temperature
If a beaker is filled with water it is observed that the surface of the water is not horizontal at the glass-water interface. This behavior is due to
A
friction
B
viscosity
C
surface tension
D
evaporation
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 #28407)
Physics
UTME / JAMB 1987
Heat Energy & Temperature
The mechanical advantage(MA) of an inclined plane depends on
A
its length
B
its height
C
the product of its length and height
D
the ratio of its length to its height
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 #28408)
Physics
UTME / JAMB 1987
Heat Energy & Temperature
Solution
A load of 5N gives an extension of 0.56cm in a wire which obeys Hooke's law. What is the extension caused by a load of 20N?
A
1.12cm
B
2.14cm
C
2.24cm
D
2.52cm
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
\(\frac{F_1}{e_1}\) = \(\frac{F_2}{e_2}\)
\(\frac{5}{0.56}\) = \(\frac{20}{e_2}\)
e2 = 2.24cm
Source: Myschool Past Questions Archive (Record #28409)
Physics
UTME / JAMB 1987
Heat Energy & Temperature
Solution
The length of a side of a metallic cube at 20ºC is 5.0cm. Given that the linear expansivity of the metal is 4.0 x 10\(^{-5}\)k\(^{-1}\), find the volume of the cube at 120^\circC.
A
126.50cm3
B
126.25cm3
C
126.00cm3
D
125.00cm3
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
Recall that: Volume = L * L * L → 5 * 5 * 5 = 125
Y = \(\frac{V_2 - V_1}{V_1 \times \theta}\)
3 x 4 x 10\(^{-5}\) = \(\frac{V_2 - 125}{125 \times (120 - 20)}\)
V\(_2\) = 126.50cm\(^{3}\)
Source: Myschool Past Questions Archive (Record #28418)
Physics
UTME / JAMB 1987
Heat Energy & Temperature
Solution
As a result of air at the top of a barometer, the height of the mercury column is 73.5cm when it should be 75.0cm; the volume of the space above the mercury is 8.0cm3. Calculate the correct barometer height when the barometer reads 74.0cm and the volume of the space above the mercury is 6.0cm3.
A
72.0cm
B
74.5cm
C
75.1cm
D
76.0cm
medium Difficulty
Verified Correct Answer: Option D
Physical Principles & Numerical Solution
Using, P1V1 = P2V2
(75 - 73.5) x 8 = (X - 74) x 6
X = 76cm
Source: Myschool Past Questions Archive (Record #28420)
Physics
UTME / JAMB 1987
Heat Energy & Temperature
Solution
A pool of water appears to be 1.0m deep when viewed vertically from above. If the refractive index of water is 1.33, what is the actual depth of the pool?
A
0.750m
B
1.013m
C
1.330m
D
13.3000m
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
n = \(\frac{\text {real depth}}{\text{apparent depth}}\)
1.33 = \(\frac{\text {real depth}}{1}\)
real depth = 1.33cm
Source: Myschool Past Questions Archive (Record #28462)
Physics
UTME / JAMB 1987
Heat Energy & Temperature
Which of the following instruments has a pure tone?
A
guitar
B
vibrating strings
C
tuning fork
D
siren
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 #28438)
Physics
UTME / JAMB 1987
Heat Energy & Temperature
In which of the following are the substance arranged in descending order of their thermal conductivities?
A
copper, steel, glass
B
steel, copper, glass
C
steel, glass, copper
D
copper, glass, steel
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 #28431)
Physics
UTME / JAMB 1987
Heat Energy & Temperature
Which of the following phenomena explains the fact that a house whose roof is coated with white paint will be cooler in the hot season than one coated with black paint ?
A
conduction
B
convection
C
refraction
D
reflection
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 #28434)
Physics
UTME / JAMB 1987
Heat Energy & Temperature
Solution
If the angle of declination in a place is 10oE, calculate the true geographic bearing if the compass reads N40oE
A
N50oE
B
N40oE
C
N30oE
D
N25oE
medium Difficulty
Verified Correct Answer: Option A
Physical Principles & Numerical Solution
The true declination is calculated by adding the reading of compass bearing to the declination at that place.
= N40^\circE + 10^\circ = N50^\circE
Source: Myschool Past Questions Archive (Record #28466)
Physics
UTME / JAMB 1987
Heat Energy & Temperature
Solution
Two capacitance of 6\(\mu\)F and 8\(\mu\)F are connected in series. What additional capacitance must be connected in series with this combination to give a total of 3\(\mu\)F
A
3\(\mu\)F
B
16\(\mu\)F
C
24\(\mu\)F
D
30\(\mu\)F
medium Difficulty
Verified Correct Answer: Option C
Physical Principles & Numerical Solution
3 = \(\frac{6 \times 8 \times c}{(6 \times 8) + (6 \times c) + (8 \times c}\)
therefore, C = 24\(\mu\)F
Source: Myschool Past Questions Archive (Record #28472)
Physics
UTME / JAMB 1987
Heat Energy & Temperature
Isotopes are nuclei which have
A
the same number of nuetrons and electrons
B
equal number of electrons and protons
C
the same atomic number but different number of neutrons
D
the same number of total particles
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 #28481)
Physics
UTME / JAMB 1987
Heat Energy & Temperature
In the fig above, M and N are insulated metal spheres in contact. A negatively charged ebonite rod P is I brought near M. When M and N are Separated and the rod is taken away, which of the following statements is correct
A
both M and N have acquired negative charges
B
both M and N have acquired positive charges
C
M has acquired negative charge and N positive charge
D
N has acquired negative charge and M positive charge
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: Official Exam / Past Question Archive
Physics
UTME / JAMB 1986
Heat Energy & Temperature
Which of the following represents the correct precision if the length of a piece of wire is measured with a meter rule?
A
35mm
B
35.0mm
C
35.00mm
D
35.01mm
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 #28483)