Answer:
The decrease in decibels is 0.1 dB.
Explanation:
Let the intensity of one chorus is Io.
let the intensity of 1000 vocalist is dB.
The intensity of 1000 vocalist is 1000 Io.
..... (1)
let the intensity of 999 vocalist is dB'.
..... (2)
So, the change is
= dB - dB' = 30 - 29.9 = 0.1 dB
Use pythagorean's theorem for this, with 7 as a and 5 as b. pythagorean's theorem says that a^2 + b^2 = c^2, so 7^2 * 5^2 = c^2. this gives you 49 + 25 = c^2, so 74 = c^2. c = sqrt 74, which is approximately 8.60 km
Answer:
0.94m/s (squared)
Explanation:
a=change in velocity/time
a=v-u/t
a=32-0=32/32
a=0.94m/s (squared)
