# please help with these old physics questions?

The wave number and the angular frequency are 6.2rad/m and 12 rad/s. what could be the equations of the wave?

8sin(6.2x-12t)

8sin(12x-6.2t)

12sin(6.2x-8t)

all of the above

Find the displacement of the wave y= 12sin(6.28x-3.14t) when x=2m and t=4s

0m

6m

12m

3m

### 1 Answer

Relevance

- jacob sLv 71 month ago
1) the equation for a travelling wave is given by

y= a sin (kx-wt)

a= amplitude

k= wave number= 6.2 rad/m

w=angular frequnecy= 12 rad/s

so y= 8 sin(6.2x-12t)

2) y = 12*sin((6.28*2) - (3.14*4))

y = 12*sin0

y = 0

Still have questions? Get your answers by asking now.