Answer:
Intensity
Explanation:
The intensity of a sound wave is equal to the ratio between to the power emitted by the source divided by the area of the spherical surface through which the wave propagates:
where
P is the power
is the area of the spherical surface
r is the distance from the source
As we see from the formula, the intensity is inversely proportional to the square of the distance from the source:
so, intensity is the correct answer.
u need a answer and I know it row
Answer:
The image of the bottle should appear larger than the actual bottle.
Explanation:
A concave mirror is a kind of lens that diverges towards the center, creating its focus into a reflected image that is larger in size. This is the reason why concave mirrors are known as divergent mirrors because the way the lens is constructed diverges in the middle.
The air would contract therefore the answer is the second choice.
The three quantities are: acceleration, initial velocity and time
1. Acceleration
We can find the acceleration using Newton's Second Law of Acceleration:
F = ma
(8,000 N) = (70 kg)(a)
Solving for a,
<em>a = 114.286 m/s²</em>
2. Initial Velocity
For this quantity, we use the equation for rectilinear motion at constant acceleration.
2ax = |v² - v₀²|
where
x is the distance
v is the final velocity
v₀ is the initial velocity
2(114.286 m/s²)(0.60 m) = |0² - v₀²|
Solving for v₀,
<em>v₀ = 11.71 m/s</em>
3. Time
We can determine time fro the formula of acceleration:
a = |v - v₀|/t
114.286 m/s² = |0 - 11.71|/t
Solving for t,
<em>t = 0.102 seconds</em>