Friday

April 18, 2014

April 18, 2014

Posted by **srikala** on Tuesday, May 29, 2012 at 12:37am.

where should the two bridges be placed from A to divide the wire in 3 segments whose fundamental frequencies are in the ratio of 1:2:6

options:

1.60cm,90cm

2.40cm,80cm

- physics -
**Elena**, Tuesday, May 29, 2012 at 4:19pmLet L1, L2, L3 be the lengths of three segments. Then L1+L2+L3 = 100.

Also from the laws of vibrations of stretched string

f1•L1=f2•L2=f3•L3

Given

f1:f2:f3 = 1:2:6.

Therefore,

L2 =L1/2, L3 =L1/6.

L1 + L1/2 + L1/6 = 100,

10•L1/6 = 100.

L1 = 60cm. L2 = L1/2 = 30 cm, L3 =L1/6 = 10 cm.

The first bridge - L1 = 60 cm

The second bridge – L1+l2 = 90 cm

Answer: 1.60cm,90cm

**Related Questions**

physics - A light rigid bar is suspended horizontally from two vertical wires, ...

physics - A light rigid bar is suspended horizontally from two vertical wires, ...

math - a wire of 100cm is bent to from a squre. if a rectangle is formed with ...

physics - in the searler's metod to determine the young's modulus of a wire , a ...

Physics - The lowest A on a piano has a frequency of 27.5 Hz. Assume: The ...

Physics!! Help!!!!! - A wire of length L and cross-sectional area A has ...

physics - Suppose that you wish to fabricate a uniform wire out of 0.900 g of ...

physics - Explain the changes in frequency with respect to changes in mass, ...

physics - A wire of uniform linear mass density hangs from the ceiling. It takes...

Physics - the area of cross section of a wire is 1/100000 m^2 length of the wire...