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WorksheetsWaves
Total questions: 61
Worksheet time: 1hrs 6mins
What type of wave is a sound wave?
electromagnetic
longitudinal
transverse
A student bangs 2 bricks together, the sound reflected off the wall. Reorder the steps needed to determine the speed of the sound
Measure the distance between the student with the bricks and the wall
Measure the time taken from banging the bricks to the echo
Double the measured distance to give the distance travelled or half the time
use: speed = distance / travelled time to calculate speed
Which letter shows the position of the ultraviolet (UV) radiation within the electromagnetic spectrum?
P
Q
R
S
UV radiation is used to treat a vitamin D deficiency. People should not use a UV lamp for long periods of time.
Which of these is not a risk factor.
Sunburn
Skin damage
Increased risk of skin cancer
Damage to the eyes
Increased risk of lung cancer
A special lamp can produce UV radiation.
Which two statements describe the electromagnetic waves emitted by a UV lamp?
Tick two boxes.
They have a higher frequency than X-rays.
They have the same wave speed as visible light.
They have a longer wavelength than microwaves.
They have a lower frequency than gamma rays.
They have a greater wave speed than radio waves.
Ionising radiation is used for some medical imaging. Name two types of electromagnetic waves that are used.
Gamma Rays
Ultra Violet
Alpha Radiation
Beta Radiation
Electricity
In a vacuum, all electromagnetic waves travel at the same (a) . Gamma waves have the greatest (b) . Radio waves have the greatest (c)
Explain why it is important that the Earth’s atmosphere absorbs gamma rays emitted by the Sun.
So people are not exposed to (as much) gamma radiation
Because gamma radiation can damage human tissue
To stop the atmosphere heating up
Gamma rays can cause nuclear explosions
Not all microwaves are absorbed by the atmosphere. This is useful because they can be used (a)
The UV index is highest in the month of (a) and lowest in the month of (b)
A risk of UV radiation is
A better sun tan
Increased risk of skin cancer
More plant growth
Increased risk of stomach cancer
Using bluetooth earphones when running is an advantage over wired earphones because
The sound travels faster
It is more high tech
There are no wires to get tangled
It also heats up the ears
v = (a) x ƒ
The electromagnetic waves have a frequency of 2 400 000 000 Hz The speed of electromagnetic waves is 300 000 000 m/s Calculate the wavelength of the electromagnetic waves.
Wavelength= Wave Speed x Frequency
(a)
How can the equipment be used to measure the frequency, wavelength and wave speed of the water
Count the number of waves in 10s and then divide by 10
Frequency
Take a photo with a ruler next to the image. Measure the distance between two consecutive wave crests
Wavelength
Use a stopwatch to time how long it takes for 5 waves to pass a fixed point then divide by 5
Wave Speed
The duck moves at (a) degrees compared to the direction of the wave
Step 1: Calculate the mean maximum height
Step 2: Calculate the mean minimum height
Step 3: Calculate the difference between the means divided by 2 (put this answer in the box)
(a)
X-rays and gamma rays are types of electromagnetic waves.
X-rays are used for medical imaging.
Which substance will not absorb X-rays?
Bone
Metal
Skin
During one X-ray a person receives a dose of 0.100 mSv
Why is this dose unlikely to harm the person?
X-rays do not do much harm
Still less than 100 mSv
X-rays go straight through a person
Skin blocks most of the X-rays
When carrying out an X-ray a doctor stands behind a screen in order to (a)
Which of the following are gamma rays used for?
Cooking food
Energy-efficient lamps
Sterilising medical equipment
Why are gamma rays and X-rays harmful to humans?
They are ionising
They are radioactive
They travel at the speed of light
Electromagnetic waves are also used in communications.
Categorise how microwaves and visible light are used in communication
Data is transmitted and detected
Used in mobile phones, Wi-Fi and satellites
Transmitted along fibreoptic cables
Used to produces images on a screen
Which wave has the greatest amplitude?
A
B
C
D
Which wave has the greatest frequency?
A
B
C
D
Which wave has the greatest wavelength?
A
B
C
D
A wave has a frequency of 1650 Hz and a wavelength of 0.200 m
Calculate the wave speed.
Use the equation:
wave speed = frequency × wavelength
(a)
What is the period of the wave shown in Figure 8?
0.002
0.004
0.006
0.008
Determine the frequency of the wave shown in Figure 8.
Period = 1/frequency
(a)
Reorder the following steps to calculate frequency and wavelength. The first 2 points are for frequency.
Count the number of waves passing a point in 10s
Divide the number of waves in 10s by 10
Take a photo of the screen under the tank with a ruler next to it
Measure the distance between 2 waves
Calculate value X in table 1
(a)
Why is it a good idea to take repeat readings and then calculate a mean?
To reduce the effect of random errors.
To reduce the effect of systematic errors.
To reduce the effect of zero errors.
The student changed the frequency of the waves in the ripple tank to 20 Hz.
Calculate the period of the waves.
(a)
At a frequency of 20 Hz the wavelength of the waves was 0.012 m.
Calculate the wave speed.
(a)
There are different types of electromagnetic waves.
What do all electromagnetic waves transfer?
Charge
Energy
Matter
Sound
Different types of electromagnetic waves have a different (a) (the distance between 2 peaks) and (b) (the number of waves per second)
Give the name of part A in the electromagnetic spectrum
(a)
Give the name of part B in the electromagnetic spectrum
(a)
Match the following
Microwaves
Satellite Communications
Ultraviolet
Energy Efficient Lamps
X-rays
Imaging Bones
The infrared detector measures the power of the infrared radiation emitted by
the flasks.
The student poured hot water into each flask
What would not reduce the risk of being burnt?
Using a funnel to pour the water
Pouring the water at arms length
Wear heat-proof gloves
Using a polystyrene cup instead o a flask
Reorder the steps in how the student should use the equipment in Figure 2 to compare the power of the infrared radiation emitted by each surface.
Heat water in a kettle
Measure a specific volume of hot water with a measuring cylinder
Put the same volume of water in each flask
Position the infrared detector the same distance from each flask
Measure the power of the infrared radiation
In table 1 the power (a) over time. The rate change (b) over time.
What is the most likely value for the power of the infrared radiation emitted
after 480 seconds?
Use Table 1.
4.0
4.2
4.4
4.6
Categorise statements as advantages or not advantages of using a Leslie cube over separate flasks
The water is the same temperature
The volume of water is the same
More surfaces can be tested at once
A cube is a better shape
It is bigger
The teacher improved the demonstration by using four infrared detectors connected to a data logger and computer. Each detector was pointed at a different surface of the Leslie Cube. The distance between the surface and the detector was the same in each case.
This means the temperature can be measured at (a) , so the results will be more (b)
Label A and B
The wave shown in Figure 8 has a frequency of 4.0 kHz
Calculate the period of the wave.
Period = 1/frequency
(a)
The wave shown in Figure 8 has a frequency of 4.0 kHz
Period = 1/frequency
What is the unit for frequency?
(a)
(a) = Frequency (b) Wavelength
A sound wave with a frequency of 300 Hz travels through the air.
The air has a temperature of 28.0 °C
Determine the wavelength of the sound wave.
Use Figure 9.
Wavelength = Wave speed / Frequency
(a)
Label the sections of the wave
Which of the following is true for longitudinal waves?
Longitudinal waves transfer charge.
Longitudinal waves transfer energy.
Longitudinal waves transfer matter.
Which property of the wave changes between 80 m and 200 m?
Amplitude
Frequency
Period
Wavelength
The farmer tests the device on a day when the temperature of the air is 15 °C.
What is the speed of the sound emitted by the device when the temperature of the
air is 15 °C?
(a)
The farmer stands a safe distance from the device.
It takes a time of 0.20 s for the sound to travel from the device to the farmer.
Calculate the distance between the device and the farmer.
Use the wave speed at 15oC
distance = speed × time
(a)
The (a) the temperature the (b) the speed, so (c) time is taken doe a sound to reach the farmer.
A (a)
B (b)
C (c)
Compare Gamma and Ultraviolet waves
More Energy
Shorter Wavelength
Higher Frequency
Less Energy
Longer Wavelength
Lower Frequency
Light changes direction when it enters the glass prism.
What name is given to this process?
(a)
The wave in the middle of the spectrum has a wavelength of 5.0 × 10–7 m.
wave speed of light = 3.0 × 108 m/s
Calculate the frequency of the wave.
Wave Speed = Wavelength x Frequency
_ x 1014
(a)
