act13ans - Do NOT write on these sheets or take them with...

This preview shows pages 1–2. Sign up to view the full content.

Do NOT write on these sheets or take them with you! The next class needs them too! PHYS-1200 PHYSICS II SPRING 2006 Class 13 Activity: Mechanical Waves SOLUTION Before You Start 1. A general expression for a wave is y ( x , t ) = y m sin( kx ± ϖ t ). If a wave is moving to the right (toward positive x ), which sign should be used in the above expression? The negative sign. If the negative sign is used, for a point of constant phase, x must increase as t increases. Thus, the wave moves in the positive x direction. 2. If the expression for the wave is y ( x , t ) = y m sin(– kx ± ϖ t ), which sign should be used to describe a wave that is moving to the left (toward negative x )? The negative sign. If the negative sign is used, for a point of constant phase, x must decrease as t increases. Thus, the wave moves in the negative x direction. 3. Which (if any) of the following parameters of the above wave will change as the wave moves: amplitude y m , shape (sinusoidal), wavelength λ , or speed v ? None of them will change. Taking Data

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 3

act13ans - Do NOT write on these sheets or take them with...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online