Answer with Explanation:
Echo depends on<em> "how sound waves are reflected back."</em> A hard object, like the walls of the multipurpose hall, <em>reflects sound waves well; </em>thus, Seema could easily hear her echo. In addition to this, the walls of the hall are also smooth and this further allows the sound waves to bounce. On the other hand, soft objects like bed cushions in Seema's room<em> absorbs sound.</em> This prevents the sound waves from being reflected. In addition to this, the sound waves have hard time bouncing because there are many objects in Seema's room.
Answer:
Explanation:
The relationship of intensity:
Intensity: 
radius: 
Power is unknown
Now we can apply the formula
There's no info about the cars starting off differently, so as far as we know they have been side by side all the way.
<span>So from the last telephone pole: </span>
<span>(a) and (b): the displacement of both cars is 65.5m
the average speed for both car is 65.5m/5.0s = 13.1m/s</span>
Answer:
Explanation:
R² = F₁² + F₂² + 2F₁F₂ Cosθ , R is resultant force , θ is angle between them
780² = 390² + 550² + 2 x 390 x 550 Cosθ
608400 = 152100 + 302500 + 429000 Cosθ
Cosθ = .3585
θ = 69 degree.
<em>L</em><em>ike the alto in a choir the octavina plays the lower melody . what musical element does this tell?</em>
answer : melody....
