Answer:
7.9Hz
Explanation:
Step one:
given data
We are told that the fourth harmonic is at 31.5 Hz
We know that harmonics are a multiple of the fundamental frequency, such that if the fundamental frequency is 25Hz, then the second harmonic is
2nd= 2*25= 50Hz
3rd= 3*25= 75Hz........and so on
Step two:
In this problem, we are told that the 4th harmonic is 31.5Hz, that is
4th= 4*f= 31.5
Divide both sides by 4 to get f
f= 31.5/4
f= 7.9 Hz
Hence the first/fundamental frequency is 7.9Hz
Answer: a
Explanation: It is the only answer that is precipitation
Answer:
Mass (m) = 5.4 kg
Force (f) = 20 N
Acceleration (a) = ?
Acceleration= m × a
![m \times a \\ = 5.4 \times 20 \\ = 108 \: ms ^{ - 2}](https://tex.z-dn.net/?f=m%20%5Ctimes%20a%20%5C%5C%20%20%3D%205.4%20%5Ctimes%2020%20%5C%5C%20%20%3D%20108%20%5C%3A%20ms%20%5E%7B%20-%202%7D%20)
=> The resulting acceleration of the object is <u>1</u><u>0</u><u>8</u><u> </u><u>m/</u><u>s²</u><u>.</u>
The choice of path should make no difference. The work should depend only on the end points and not on the route between them. But just to make sure, could we please have a look at the accompanying figure ?
Answer:
Explanation:Required formula is
W=F *S
W=work =?
F=force =5N
S=displacement =0.5m
please feel free to ask if you have any questions