A wire of diameter 1.0 mm and length 3.5 m stretches 3.5 mm when ...

[bobbie]

A wire of diameter 1.0 mm and length 3.5 m stretches 3.5 mm when 8.0 kg is hung from it.
 
  (a) What is the Young's modulus for the wire?
  (b) What is the effective spring constant for the stretching wire?

Question 2

Two coherent sound waves will destructively interfere when the path difference is the wavelength times what?
 
  A) half an even integer
  B) an integer
  C) half an odd integer
  D) an odd integer

[Jane]

Answer to Question 1

(a) 1.0  1011 N/m2
(b) 2.2  104 N/m

Answer to Question 2

C

[bobbie]

Thanks for the timely response, appreciate it

[Viet Thy]

Excellent