Answer:
Depth is 7.49cm
Explanation:
Given that;
The diameter of tube is (D)=4.7cm
Area of the tube is =πD^2/4
Area is 3.142*4.7*4.7/4=17.35cm2
Mass(M)=130g
Density =1g/cm^3
Recall that Density =mass /volume
Hence volume =130/1=130cm^3
Also note
Volume=area*depth
130=17.35*depth
Depth=130/17.35=7.49cm
Answer:
68.8 Hz
137.6 Hz, 206.4 Hz
Explanation:
L = Length of tube = 2.5 m
v = Velocity of sound in air = 344 m/s
Distance between nodes is given by
Where n = 0, 1, 2, 3, ...
Making n+1 = n
where n = 1, 2, 3 .....
For fundamental frequency n = 1
Frequency is given by
The fundamental frequency is 68.8 Hz
First overtone
Second overtone
The overtones are 137.6 Hz, 206.4 Hz
<h2>Diagonal of circle </h2>
Explanation:
As the skateboarder wants to cross the play ground . The surface is rough .
As we know , the force of friction is non-conservative force . Thus work is required against this force .
We have formula:
work done = Force x distance (in one direction )
Te force applied cannot be changed , so he is to decrease the distance .
In case of circle , diameter is the minimum distance . Thus he is supposed to move along it .
it would be at either A or B.
