In a ripple tank, a point on the the third nodal line from the centre is 35.0cm from another. The sources are 11.2cm apart and vibrate in phase at 10.5Hz. Calculate the wavelength and the speed of the waves.

Question

nottim · Answer

I haven't done the question. Just wondering what the values correspond with what variables?

nottim · Answer

f= 10.5Hz, d=11.2cm, n=3, l=35.0cm. That's what I think. The formulas gunna be tricky too.

anonymous · Answer

each node appear at half a waveleght

$$35 cm=3 \frac{\lambda}{2}$$

$$\lambda=35*3/2$$

anonymous · Answer

noone answered before because you posted in wrong group

anonymous · Answer

$$v= f \lambda$$

nottim · Answer

Sorry. Came back. How do I post in right group? NEw format messed me up.

anonymous · Answer

it's not new format, just join other group and post there

nottim · Answer

ok

nottim · Answer

i already joined the physics group. how do i post there.

anonymous · Answer

change your group to physics and same like in this group

nottim · Answer

It won't let me change.

nottim · Answer

When I look at it, its greyed out.

nottim · Answer

The thing I use to use to change the groups.

anonymous · Answer

what you use to change groups?

nottim · Answer

The thing under the question box. Where it says Current Group: