Answer:
A) 443 Hz
B) She has to loosen the string
Explanation:
A) Given;
Beat frequency;f_beat = 3 Hz
Frequency of electronically generated tone; f_e = 440 Hz
We know that formula for beat frequency is given by;
f_beat = |f1 - f2|
Now, applying it to this question, we have;
f_beat = f_v - f_e
Where f_v is frequency of the note played by the violinist
Thus, plugging in the relevant values;
3 = f_v - 440
f_v = 3 + 440
f_v = 443 Hz
B) In the concept of wave travelling in a string, the frequency is directly proportional to the square root of the force acting on the string.
Now, for the violinist to get her violin perfectly tuned to concert A from what it was when she heard the 3-Hz beats, the beat frequency will have to be zero. Which means it has to decrease by 3 Hz. For it to decrease, it means that the force applied has to decrease as we have seen that frequency is directly proportional to the square root of the force acting on the string.
Thus, she would have to loosen the string.
Answer:
I think its c
Explanation:
I hope this helps u and u get it right :D
Answer:
The frequency of a wave is measured in Hz (hertz)
Let Mass be m
If its doubled then
Hence force also needs to be doubled.
Not sure what the answer choices are.
My answer would be <span>TRUE</span> One lighting strike can deliver up to 1billion volts of electric power. There are on <span>average of 40 to 50 death a year of lightning strikes.</span>
