In a longitudinal wave, particle displacement is opposite to the direction of wave motion. Question 12. 12. In the Waves lab, you changed _____ to see how it would affect wave speed. (Points : 3) length of string tension of string type of string how hard you plucked the string Question 13. 13.
Six months If you file for an extension on your individual tax return, the IRS will give you six more months to complete the return. The IRS changed the extensions in 2006. There is now only the option for 6-month extensions (it used to be that you would file one extension, and could then file a second one for a total of 6 months).
1 Therefore, tax documentation should be kept for at least 8 years. 2  For notices issued beginning August 1, 2011: FTB has 12 years after a taxpayer files a return to mail a proposed deficiency assessment. 3  Therefore, tax documentation should be kept for at least 12 years.