Question 3 of 10
1 answer:
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Answer:
439 Hz
Explanation:
= Frequency of first wave = 440 Hz
F = Beat frequency = 1 Hz
= Frequency of the instrument
The beat frequency is the difference of the two waves which are interacting with each other
The frequency of the instrument is 439 Hz
Mathematically we know that the position is the integral of the velocity as a function of time, that is, the general formula for determining the position as a function of velocity would be given by
Here
represents the initial position, and the integral, the position with respect to the speed of the object within a certain time
Replacing and considering that there is no starting position,
Answer:
3. Her angular speed increases because her angular momentum is the same but her moment of inertia decreases
Explanation:
II ωi the intial angular momentum of the skater. Her angular momentum changes to If ωf after pulling her arms in.
It must be noted that If is less than II, then it is because her arms now go round not far from the rotation axis which brings down the mementos of inertia.
Angular momentum does not change since torque is O.
Note: the mathematical representations are better written on the attached diagram.
