The wavelength of sound wave with frequency 770 Hz and speed of 290 m/s is equal to 0.3767 m
<h3>Explanation:</h3>The wave equation determining the relationship between speed, frequency and wavelength of a sound wave is given by:
<u>Speed of sound = Frequency of sound × Wavelength of sound wave</u>
v = n × λ .................................(1)
Given:
v = Speed of sound wave = 290 m/s
n = Frequency of sound = 770 Hz
λ = Wavelength = ?
From (1)
v = n × λ
Rewriting the equation for λ, we get
λ =
Substituting the values of v and n, we get
λ =
Hence, the wavelength of sound wave is equal to 0.3767 m
Answer:
Explanation:
Given
Original Frequency
apparent Frequency
There is change in frequency whenever source move relative to the observer.
From Doppler effect we can write as
where
apparent frequency
v=velocity of sound in the given media
velocity of source
velocity of observer
here
i.e.fork acquired a velocity of
distance traveled by fork is given by
where v=final velocity
u=initial velocity
a=acceleration
s=displacement
Answer:
They will both be recorded in Joules
Explanation:
- The energy of an object refers in general to the mechanical energy of the object, which is the sum of its kinetic energy (KE), which is the energy of motion, and of its potential energy (PE), which is the energy due to its position above the ground:
- The work done by an object is equal to the product between the force exerted by the object, F, and the displacement, d:
(1)
The SI units of the energy is the Joules, J. The basic equivalence with SI units can be seen from the definition of kinetic energy:
where
m is the mass, measured in kilograms (kg)
v is the speed, measured in meters per second (m/s)
So we have, since the speed is squared
Now we can check from eq.(1) that the work as the same units. In fact, the force is measured in Newtons (N), and we know that force is equal to mass times acceleration, so we have:
Distance is measured in meters (m), so the work is measured in
Which corresponds to the definition of Joule. Therefore, both energy and work are measured in Joules.