<h2>The intensity of siren is 0.015 W m⁻²</h2>
Explanation:
The intensity of sound is inversely proportional to the square of distance between source and the observer .
Thus Intensity at a distance 25 m is I₁ ∝ 
I
Similarly the intensity at a distance 50 m is I₂ ∝ 
II
Dividing II by I , we have
= 
= 
= 
Thus I₂ = x 0.06 = 0.015 W m⁻²
The part of the electromagnetic spectrum has a shorter wavelength than ultraviolet light is x-rays.
Compared to coffee at room temperature, the molecules of the coffee at 34°C will be moving faster and colliding with one another more frequently.
Answer: I have no idea either i need help aswell
Explanation:
B. A pot of boiling water represents a system that is completely open.
