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
Answer:
Step-by-step explanation:
(330m/s)(km/1000m)=0.33km/s
Answer:
n = 2
Step-by-step explanation:
2 - 22 = -9n + 22 - n - 22
-20 = -9n - n
-20 = -10n
-20/-10 = -10/-10n
-2 = -n
n = 2
3250
You will need to Multiply 10x325
Answer:
AB=8cm
Step-by-step explanation:
Since ABC is a right angled triangle,
Using pythagoras theorem,
h²=p²+b²
or, BC²=AC²+AB²
or, 17²=15²+AB²
or, 289=225+AB²
or, 289-225=AB²
or, AB² = 64
so, AB=8 cm
