Answer:
19n+9u=7500 and 4u-n
Step-by-step explanation:
Answer:
210 ml
Step-by-step explanation:
Answer:
Apparent Increase in Wave Frequency
As the ambulance approaches you, the distance between the source of the waves and the observer decreases. Consequently, the siren sounds more shrill as the pitch of the wailing siren 'sounds' higher than its original value, as sound waves reach you 'more frequently'.
Step-by-step explanation
hope this helps
If this is a T/F question, then your answer is True .-.