311.
The general definition of elastic modulus is
A.
stressstrain
B.
strainstress
C.
stress×strain
D.
√stressstrain
Correct answer is A
Elastic modulus is the ratio of pressure (stress) applied to a body to the resistance (strain) produced by the body.
= stressstrain
312.
The S.I unit for sound energy is
A.
Hz
B.
cd
C.
dB
D.
J
Correct answer is D
Every form of energy is measured in joules (J).
313.
A.
0.56
B.
1.50
C.
1.79
D.
2.02
Correct answer is C
N = 1sinθ
= 1sin34
= 1.79
314.
A.
66m
B.
136m
C.
264m
D.
528m
Correct answer is B
2 × Distance = speed × time
2 × Distance = (340) × (0.8)
= 272/2
Distance = 136m
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