1) If two sound waves have exactly the same wavelength and amplitude, which feature of these waves can be different?

a) Period

b) Speed

c) Frequency

d) Phase

2) Wavelength - 20m. Speed - 2m/s. Find the frequency.

a) 0.1Hz

b) 10Hz

c) 40Hz

d) Not enough information

3) Two waves overlapping with amplitudes added is called

a) Interference

b) Inference

c) Indifference

d) Interconference

4) A police car turns on its siren and starts to accelerate towards you. What happens to the siren pitch (the frequency) that you hear?

a) stays the same

b) increases

c) decreases

d) initially decreases then increases when the car is close enough

5) Sound waves are what type of wave?

a) Longitudinal

b) Transverse

c) Longitudinal and transverse simultaneously

d) Either transverse or longitudinal

Please answer ASAP

Thanks