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Question 1 Physics | LAUTECH Post UTME
A
2.0 x 10-6m3  
B
2.5 x 10-6m3  
C
3.0 x10-6m3  
D
2.0 x 10-6m3  
Explanation.
Share Answer Weight of liquid displaced = Upthrust
= (0.040 - 0.024)N
= 0.016N = 0.016/10 = 1.6 X 10-3kg
Volume of the object = Volume of liquid displaced
=

  Mass of liquid     = 1.6 x 10-1kg
density of liquid      800kgm-2


= 2.0 x 106m3 (A)


Correct Option:
A
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Question 2 Physics | LAUTECH Post UTME
A
20ms2, 20ms1  
B
25ms2, 250ms  
C
20ms2 200ms4  
D
10ms2 300ms-4  
Explanation.
Share Answer Ft = mv - mu
Ft = m (v-u)
100 x 10 = 5(v-0)
1000 = 5v
V = 200m/s
V = u – at
200 = 0 – mass
a = 20m/s2 (C)

Correct Option:
C
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Question 3 Physics | LAUTECH Post UTME
A
change in momentum of a body  
B
its unit is Ns  
C
product of force and time  
D
change in acceleration of a body  
Explanation.
Share Answer Impulse, Ft = m(v-u)

(D)

Correct Option:
D
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Question 4 Physics | LAUTECH Post UTME
A
2000 watt  
B
3000 watt  
C
4000 watt  
D
5000 watt  
Explanation.
Share Answer Power, P = = FV

V = velocity
Power P = FV = (200N (20m/s)
= 4000W (C)


Correct Option:
C
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Question 5 Physics | LAUTECH Post UTME
A
momentum is proportional to force action  
B
action is equal to reaction but in the opposite direction  
C
impulse force is inversely proportional to time  
D
force is proportional to rate of change of momentum  
Explanation.
Share Answer The second law of motion states that a body which is subjected to a net
external force (F) acquires
acceleration which is directly proportional to the force and inversely proportional to the mass of the body i.e. F = ma
(C)

Correct Option:
C
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Question 6 Physics | LAUTECH Post UTME
A
heat energy  
B
intent heat of fusion  
C
specific latent heat of fusion  
D
specific heat capacity  
Explanation.
Share Answer Specific latent heat of fusion (C)

Correct Option:
C
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Question 7 Physics | LAUTECH Post UTME
A
57,708J  
B
42,708J  
C
35,208J  
D
50,208J  
Explanation.
Share Answer Since I calorie = 4.184J
12,000 calorie = (4.184 x 12,000)J = 50.208J
heat supplied = Work done
(∆Ω) + ∆U (internal energy)
50,208 = 7500J + ∆5
∆5 = (50.208 – 7500)J
= 42708J (A)

Correct Option:
A
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Question 8 Physics | LAUTECH Post UTME
A
convection  
B
conduction  
C
radiation  
D
conduction and radiation  
Explanation.
Share Answer Convection is the transfer of heat from a hotter region of a Fluid to a colder region through the actual motion of the fluid (A)

Correct Option:
A
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Question 9 Physics | LAUTECH Post UTME
A
8.06KJ  
B
706KJ  
C
538KJ  
D
6.72KJ  
Explanation.
Share Answer Heat required to change the phase of
mass, in of the substance is Q = rnLf
= 20kg x 336Kg-1
= 6.72 x 103J
= 6.72kJ (D)

Correct Option:
D
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Question 10 Physics | LAUTECH Post UTME
A
0.1Jg-1K-1  
B
0.2g-1K-1  
C
0.4Jg-1K-1  
D
Explanation.
Share Answer Specific heat capacity = m x c x ∆θ
= (0)(20)(20)
Required, H = mcθ
20 = 10 x c x 20K
(A)

Correct Option:
A
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