Why does the frequency of a wave increase as the wavelength decreases? A) because the wave speed remains constant B) because the
2 answers:
Answer:
A) because wave speed remains constant.
Explanation:
The wave speed of a wave in a medium depends on the nature of the medium.
For transverse waves in a string given by,
, T = tension , m = linear density
For longitudinal waves in a solid,
, ξ = modulus of elasticity, ρ = density
Like wise for different media, different properties and parameters govern the speed of waves moving through them.
It is important to mind in v = fλ ,f or λ does not influence on speed of wave in a medium but shows how f and λ varies as a wave propagate in a medium(/media).
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Answer:
The kinetic energy will be "399.65 J".
Explanation:
Given:
Mass,
m = 1.2 kg
Velocity,
v = 31.3 m/s
The total energy of mass will be:
⇒
or,
⇒
By putting the values, we get
Since,
The system's total energy is unchanged, then
⇒
or,
⇒
Answer:
Fapp = 3 N
Explanation:
- Applying the work-energy theorem, we know that the net work done on one object by an applied force, is equal to the change in the kinetic energy of the object.
- This work is just the product of the applied force times the displacement, as follows:
- This must be equal to the change in kinetic energy:
- Equating (1) and (2), and replacing by the givens, we can solve for Fapp, as follows:
- The magnitude of the applied force is 3 N.