## NotTim Group Title 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. 2 years ago 2 years ago

1. NotTim Group Title

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

2. NotTim Group Title

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

3. imranmeah91 Group Title

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

4. Tomas.A Group Title

noone answered before because you posted in wrong group

5. imranmeah91 Group Title

$v= f \lambda$

6. NotTim Group Title

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

7. Tomas.A Group Title

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

8. NotTim Group Title

ok

9. NotTim Group Title

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

10. Tomas.A Group Title

change your group to physics and same like in this group

11. NotTim Group Title

It won't let me change.

12. NotTim Group Title

When I look at it, its greyed out.

13. NotTim Group Title

The thing I use to use to change the groups.

14. Tomas.A Group Title

what you use to change groups?

15. NotTim Group Title

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