A wave has a wavelength of 4.9 m and a velocity of 9.2 m/s. The medium through which this wave is traveling is then heated to a
2 answers:
Answer:
B. The frequency is greater than 1.9 Hz.
Explanation:
As we know by the equation of frequency of wave
here we know that
now from above formula we have
now it's given that when wave is travelling then temperature of the medium is heated to greater temperature.
So here energy is given by the wave to the medium so here we can say that the frequency of wave must be more than this calculated frequency as we know that this some of its energy is given to medium so that its temperature is increasing
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Answer:
The angular velocity is
Explanation:
From the question we are told that
The mass of the block is
The of the pulley is
The radius of the pulley is
The radius of the cord around the pulley is
The distance of the block to the floor is
From the question we are told that the moment of inertia of the pulley is
Substituting value
Using the Newtons law we can express the force acting on the vertical axis as
=>
Now when the pulley is rotated that torque generated on the massless cord as a r result of the tension T and the radius of the cord around the pulley is mathematically represented as
Here is the angular acceleration
Here is the torque which can be equivalent to
Substituting this above
Substituting for T
Here is the linear acceleration which is mathematically represented as
making the subject
Substituting values
Now substituting into the equation above to obtain the acceleration
This acceleration is
and v is the linear velocity with is mathematically represented as
Substituting this into the formula acceleration
making t the subject
substituting value
Now the linear velocity is
The angular velocity is
So
Generally 1 radian is equal to 0.159155 rounds or turns
So 5.59 radian is equal to x
Now x is mathematically obtained as
Also
60 second = 1 minute
So 1 second = z
Now z is mathematically obtained as
z
Therefore