2TTO 10-3

• Natuurkunde
• Middelbare school
• havo
• Leerjaar 2

2 TTO 12-3

The higher the frequency, the                  the pitch

The higher the frequency, the                  the vibration period

Problem of the day

higher

lower

longer

shorter

Recap questions

Remember the things we talked about last lesson

distance = speed of sound x time

T = 1 / f 

f = 1 / T

Put the names below the objects

Source

Medium

Reciever

What is wrong with the sound effects in Star Wars?

1. The noises are not loud enough
2. There is no medium in space
3. The speed of sound through space is too large
4. The frequency of the effects is to high

The speed of sound through air = 343 m/s. A sound wave travels for 0,8 seconds. Calculate the distance travelled by the wave

A string has a frequency of 30Hz. Calculate the vibration period

Quick recap

Sound source - Medium - Reciever

No medium =

s = 

v =

t = 

speed of sound through air = 343 m/s

s=v⋅t

Quick recap

Frequency (f): The amount of vibrations per second

Vibration period (T): The duration of 1 vibration

T=​f​​1​​

f=​T​​1​​

Homework presentation

Test check

Duration: 10 minutes

Work in pairs

1. Check your answers with the handed out answer sheet
2. Correct your answer in a different colour pen
3. Compare your answers with your pair -> Do you both understand your mistakes? Communication is key

3 choices

1. Do the other homework questions in book (Testhelper)
2. Do test yourself CH6/7 on PC
3. Study for the test (Make a summary/keyterm list etc.)