1.4 Balloon on a string - Finish report

• Natuurkunde / Scheikunde
• Middelbare school
• vmbo b, k, t, havo, vwo
• Leerjaar 1-3

Get your stuff please:                                

Regels van orde

1e keer:  Waarschuwing --> Maximaal 3 namen op het bord

2e keer: Kleine schrijfopdracht op de gang

3e keer: Eruit, naar Loket 21

Nooit! 

Geluid uit telefoons / Oordopjes in 
Gooien
Eten/drinken 

Mutsen op / Jassen aan / Tassen op tafel  

Homework

Read chapter 1.4

Do exercises
35, 36, 41, 45 of chapter 1.4

 = Homework

..:..

1.4 Balloon on a string - Doing research

• Slowmotion factor --> Balloon in realtime
  
  
• Writing the research report
  
  
• Creating graphs from measurement data

Who still needs a print of 1.4?

Learning objectives

• You can write a research report on a research you did.
  
  
• You can create graphs from measurement data.

Slowmotion factor

If you used slowmotion to record the balloon, we need to know how long a slowmotion video second lasted in reality:

Look at your 10 s video of the clock, or make it with the same camera.

* See how long 10 seconds on the clock lasts in slowmotion time

* Divide the amount by 10 --> you have the Slowmotion factor
   (f.i., it lasts 50 seconds, then your slowmotion factor is 50/10=5)

* Now divide the time your balloon in slow motion takes by the slowmotionfactor
  (f.i., slowmotion factor =5. Balloon takes 13 seconds in slowmotion, then 13/5=2,6 s in reality)

Research report - see page 22

• Write the report digitally
• One page
• Use all 7 steps, including suggestions
    (points can be combined like example page 22)
• Add an image, like a screenshot of the movie
   or photo of your team in action
• Make your own report, but you can discuss with team mates
• Hand in, printed, next lesson
• Will be graded: 1 grade for all practical assignments the year
• Graded on clearness, tidiness and correct use of numbers, quantities and units

  0. Title, name, class, date

  1. Research question

  2. Hypothesis / Prediction

  3. Apparatus

  4. Method

  5. Observations

  6. Results & Conclusion

  7. Suggestions

Create graphs on the blackboard (1)

14:15

t (s)	s (m)
0	0
1,0	0,51
2,0	0,91
3,0	1,53
4,0	2,09
5,0	2,40

Exchange:
Repeating research report

V5

V2

Create graphs on the blackboard (2)

14:15

t (s)	s (m)
0	0,1
1,0	3,1
2,0	11,9
3,0	27,2
4,0	47,8
5,0	75,4

Exchange:
Repeating research report

V5

V2

Discuss the homework

Exercises 35, 36, 41, 45

14:15

Measuring: Always inaccuracy

Quantities & Units

quantity	symbol	unit	abbreviat.	m. instrum.
mass	m	kilogram	kg	scales
volume	V	litre	L	graduated cylinder
length/distance	l / s	metre	m	ruler, measuring tape
temperature	T	degree Celcius	°C	thermometer
time interval	t	second	s	clock, stopwatch
number	-	-	-	counter