Turn on thread page Beta
    • Thread Starter
    Offline

    7
    ReputationRep:
    Water waves are viewed with a stroboscope. The wavelength is 10cm and the amplitude is 2cm. Calculate the wave displacement at 8cm and 35cm.
    (No other info was given!)
    Any help much appreciated! Thanks
    Offline

    3
    ReputationRep:
    I'm not a hundred pecent sure (I'm still doing GCSEs), but all waves are in the form of a sine wave. So this particular wave could be modelled mathematically in the form y = 2sin(x * 2pi / 10). I got the expression from transforming y = sin(x) to be twice as tall (since the amplitude is 2, while sine is normally 1 at its highest point) and also stretch it out by a factor of 10/2pi, since the wavelength of sine is normally 2pi, but we need it to be 10. X here is the distance in cm along the line of the transfer of energy of the wave and y is the displacement in cm at that point. So at 8 cm, the displacement would be -1.90cm (3sf) and at 35cm, the displacement would be 0cm.

    Someone might need to correct me.
 
 
 
Poll
Do you think parents should charge rent?
Help with your A-levels

All the essentials

The adventure begins mug

Student life: what to expect

What it's really like going to uni

Rosette

Essay expert

Learn to write like a pro with our ultimate essay guide.

Uni match

Uni match

Our tool will help you find the perfect course for you

Study planner

Create a study plan

Get your head around what you need to do and when with the study planner tool.

Study planner

Resources by subject

Everything from mind maps to class notes.

Hands typing

Degrees without fees

Discover more about degree-level apprenticeships.

A student doing homework

Study tips from A* students

Students who got top grades in their A-levels share their secrets

Study help links and info

Can you help? Study help unanswered threadsRules and posting guidelines

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.