Select the letter that is pointing to amplitude
Select the letter that is pointing to amplitude
On a longitudinal wave, in which areas are particles farthest apart?
The satellites receive and transmit data using electromagnetic waves with different frequencies.
Give ALL properties that is the same for electromagnetic waves with different frequencies.
Select the letter that is pointing to amplitude
Select the letter that is pointing to peak/crest
Select the letter that is pointing to wavelength
Select the letter that is pointing to trough
Which of these waves has the lowest amplitude?
Which of these colour has the shortest wavelength?
Waves move energy not matter.
Match the vocabulary term to its correct definition by dragging the definition next to the correct term.
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
The highest point of the wave | arrow_right_alt | Amplitude |
The height of a wave from the rest position (middle) | arrow_right_alt | Crest |
A disturbance that transfers energy from one location to another location | arrow_right_alt | Frequency |
The distance between two similar points in a wave (crest to crest) | arrow_right_alt | Trough |
The number of waves that pass a point per unit of time | arrow_right_alt | Wave |
The lowest point of the wave (bottom) | arrow_right_alt | Wavelength |
Waves move energy not matter.
The figure below shows a ripple tank.
The wooden bar vibrates up and down producing waves on the water.
The light source produces shadows of the water waves on the screen.
A student measured the frequency and wavelength of the waves produced.
The table below shows some of the results.
Reading | 1 | 2 | 3 | Mean |
Frequency in hertz | 12.8 | 12.4 | 12.3 | X |
Calculate value X in the table above.
Why is it a good idea to take repeat readings and then calculate a mean?
The student changed the frequency of the waves in the ripple tank to 20 Hz.
Calculate the period of the waves.
Use the equation:
At a frequency of 20 Hz the wavelength of the waves was 0.012 m.
Calculate the wave speed.
Use the equation:
wave speed = frequency × wavelength
Match the keywords to their meaning
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Period | arrow_right_alt | The distance travelled by a wave in one second |
Wavespeed | arrow_right_alt | The number of waves passing a fixed point each second |
Frequency | arrow_right_alt | The time taken for one wave to pass a fixed point |
What is meant by the 'period of a wave'
Data is transmitted to the satellites by electromagnetic waves with a frequency of 48 GHz.
Calculate the period of waves with a frequency of 48 GHz.
Q1ai
Q1aii
Q1aiii
Which electromagnetic waves are used to transfer data between Earth and satellites?
X-Rays and Gamma Rays are harmful to humans, so medical professionals use them sparingly in medical imaging and to kill cancer cells.
X-Rays and Gamma Rays are harmful to humans, so medical professionals use them sparingly in medical imaging and to kill cancer cells.
Sort each wave to its use
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Ultraviolet | arrow_right_alt | Long range communication (radio, TV) |
X-ray | arrow_right_alt | Satellite communication (WiFi, mobile phones), Heating food |
Radio Waves | arrow_right_alt | Remote controls, Fibre optics, Thermal imaging, Night vision, Heating/cooking things, Motion Sensors, Electrical heaters |
Gamma rays | arrow_right_alt | Taking photos and Videos, Fibre optic cables |
Visible Light | arrow_right_alt | Detecting security ink, Fluorescent bulbs, Tanning |
Infrared | arrow_right_alt | Photographing bones, Airport security |
Microwaves | arrow_right_alt | Sterilising medical tools, Treating cancer |
Q1b
Q1ci
Q1cii
Q1ciii
Q1di
Which electromagnetic spectrum wave has the longest wavelength?
Q1dii
Which electromagnetic spectrum wave has the highest frequency?
Name the wave found between ultraviolet and gamma rays on the electromagnetic spectrum
Name the wave found between microwaves and visible light on the electromagnetic spectrum
What is transferred by the sound waves as they travel through the air?
Tick (✓) one box.
Order from longest wavelength to shortest
Ultraviolet
Gamma Rays
Infrared
Microwaves
X-rays
Radio waves
Visible Light
Which of the following electromagnetic waves has the greatest frequency?
Match the unit to its symbol prefix
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Megahertz | arrow_right_alt | Hz |
Hertz | arrow_right_alt | kHz (1000Hz = 1kHz) |
Gigahertz | arrow_right_alt | MHz (1000000Hz = 1MHz) |
kilohertz | arrow_right_alt | GHz (1000000000 = 1GHz) |
Food colouring can be used to change the colour of water.
A student investigated how the colour of water affects the time taken for the
water to cool.
This is the method used.
1. Put 200 cm3 of hot water into a conical flask.
2. Add four drops of food colouring to the water.
3. Place a digital thermometer in the water.
4. Start a timer when the temperature of the water is 80.0 °C.
5. Record the time taken for the water to cool to 65.0 °C.
6. Repeat steps 1 to 5 using different colours of food colouring.
Which Required Practical is this a version of?
What is an independent variable?
What is an dependent variable?
What is an control variable?
Match the variable in this investigation
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Volume of water | arrow_right_alt | Independent Variable |
Colour of the water | arrow_right_alt | Dependent Variable |
Final temperature of water | arrow_right_alt | Control Variable |
What equipment should have been used to make sure 200 cm3 of water was put in the conical flask?
The student also tested water with no food colouring.
The temperature of the water changed from 80.0 °C to 65.0 °C in a time of 5.0 minutes.
Calculate the change in temperature
The student also tested water with no food colouring.
The temperature of the water changed from 80.0 °C to 65.0 °C in a time of 5.0 minutes.
Calculate the average rate of change of temperature of the water.
Use the equation:
average rate of change of temperature = change in temperature / time taken
Complete Figure 4.
You should:
• label the y-axis
• add a scale to the y-axis
• draw bars for the green water and the violet water.
Use the 'T' tool to type and the shapes tool to be precise
In the visible spectrum, orange light is between red light and yellow light.
Estimate the rate of change of temperature if orange food colouring was used.
Use Table 1.
Estimated rate of change of temperature =
The results show that the colour of the water affects the rate at which the __________________ water emits .
The water in each conical flask cools down because the electromagnetic radiation emitted by the water transfers ______________.
