- (A) the sum of the frequencies of two tuning forks
- (B) the difference of the frequencies of two tuning forks
- (C) the ratio of the frequencies of two tuning forks
- (D) the frequency of either of the two tuning forks
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- (A) frequency in the audible range
- (B) frequency is greater than 20 kHz
- (C) frequency lower than 20 Hz
- (D) all of above
- (A) 313°C
- (B) 586°C
- (C) 819°C
- (D) 1172°C
- (A) Water
- (B) air
- (C) copper
- (D) ammonia
- (A) 332 ms-1
- (B) 320 ms-1
- (C) Zero
- (D) 224 ms-1
- (A) adiabatic
- (B) isothermal
- (C) isobaric
- (D) isochoric
- (A) always an node in formed
- (B) always an antinode is formed
- (C) neither node nor antinode is formed
- (D) sometimes a node and sometimes an antinode is formed
- (A) antinodes
- (B) nodes
- (C) troughs
- (D) crests
- (A) frequency
- (B) period
- (C) Wave length
- (D) phase difference
- (A) refraction
- (B) polarization
- (C) interference
- (D) diffraction
