Speed of sound in air is {{}}
A) 280 m s-1
B) 300 m s-1
C) 350 m s-1
D) 330 m s-1
Correct Answer:
Verified
Q14: Smallest division on stopwatch is
A)0.1 s
B)0.05 s
C)0.01
Q15: intensity of sun's radiation is about {{}}
A)1.0
Q16: When light enters from vacuum in to
Q17: As wave travels, intensity
A)increases
B)remains same
C)decreases
D)varies
Q18: Waves that move through materials are called
A)progressive
Q20: Particles vibrate about their mean positions and
Q21: Speed of electromagnetic radiation is independent of
A)wavelength
B)amplitude
C)time
Q22: Mechanical waves include
A)sound
B)light
C)EM waves
D)UV waves
Q23: A complete cycle of wave is around
A)90°
B)180°
C)45°
D)360°
Q24: Changing magnetic field induces
A)charge
B)current
C)frequency
D)voltage
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