Electromagnetic waves are not mechanical and transverse in nature, while
Sound waves are mechanical and longitudinal
Explanation:
In physics, waves are classified into two types:
- Mechanical waves are those where the vibration is produced by the vibrations of the particles in a medium, therefore they need a medium to propagate
- Electromagnetic waves are those produced by the oscillations of electric and magnetic fields; they do not a medium to propagate, since they can travel through a vacuum
Moreover, depending on the direction of the vibration, waves are further classified into:
- Transverse waves: those where the direction of the vibration is perpendicular to the direction of propagation of the wave
- Longitudinal waves: those where the direction of the vibration is parallel to the direction of propagation of the wave
Electromagnetic waves are not mechanical and transverse in nature (the oscillations of the electric and magnetic fields occur in a plane perpendicular to the direction of the wave), while
Sound waves are mechanical and longitudinal (the vibrations of the particles of the medium is back-and-forth along the direction of propagation of the wave)
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Answer:
0.35 m³/s
Explanation:
When the pipe's depth is 0.4 m, the area of the circular segment is:
A = ½ R² (θ − sin θ)
The depth of the water is:
h = R (1 − cos(θ/2))
Solving for θ:
0.4 = 0.5 (1 − cos(θ/2))
0.8 = 1 − cos(θ/2)
cos(θ/2) = 0.2
θ/2 = acos(0.2)
θ = 2 acos(0.2)
θ ≈ 2.74 rad
The area is therefore:
A = ½ (0.5 m)² (2.74 − sin 2.74)
A = 0.338 m²
The cross-sectional area when the pipe is full is:
A = π (0.5 m)²
A = 0.785 m²
The flow velocity is constant:
v = v
Q / A = Q / A
(0.15 m³/s) / (0.338 m²) = Q / (0.785 m²)
Q = 0.35 m³/s
The historical method includes what steps?
The answer is A. a habitat’s features are determined by the abiotic factors such as temperature and humidity.
