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topic 6 waves
required practicals
rp ripple tank
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Cards (27)
What should you be able to describe by the end of this video?
How to use a
ripple tank
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What quantities can be measured using a ripple tank, as described in the video?
Wavelength
,
frequency
, and speed of water waves
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Is using a ripple tank to measure wavelength, frequency, and speed of water waves a required practical?
Yes
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What is a ripple tank used for?
To observe the features of water
waves
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What is a ripple tank?
A shallow tray of
water
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What is placed in the water of the ripple tank?
A
vibrating bar
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To what is the vibrating bar connected?
A
power pack
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What does the vibrating bar do when connected to a power pack?
It creates
waves
across the
water's
surface
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What is located above the ripple tank?
A
lamp
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What is located below the ripple tank?
A sheet of
white paper
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Why is a lamp and white paper used with a ripple tank?
To produce an
image
of the waves
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What is the easiest way to record the waves for analysis?
Using a
mobile phone
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Why is it useful to record the waves using a mobile phone?
It allows
playback
at different
speeds
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What should you place on the paper to measure the wavelength?
A
ruler
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After placing the ruler, what should you do with the recorded image to measure the wavelength accurately?
Freeze
the
image
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Why measure the distance across multiple wavelengths instead of just one?
To improve measurement
accuracy
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If 10 wavelengths measure 26 centimeters, what is the length of one wavelength in meters?
0.026
meters
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What is frequency?
Number of waves passing a point each
second
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Why is it more accurate to count waves over 10 seconds instead of 1?
To reduce
errors
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What else do you need to record alongside the waves to measure the frequency accurately?
A
timer
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What is the unit of frequency?
Hertz
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If you count 24 waves passing a point in 10 seconds, what is the frequency?
2.4 Hertz
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What is the wave equation?
Wave speed
=
frequency
x
wavelength
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If the frequency is 2.4 Hz and the wavelength is 0.026 meters, what is the wave speed?
0.0624
meters per second
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How can you calculate wave speed by measuring distance and time?
Speed = distance traveled / time taken
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Why might you get slightly different results using the wave equation and the direct measurement method?
Due to
measurement errors
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Where can you find more questions on this practical?
In the
revision workbook
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