C1 Quick Revision Questions - WordPress.com · P6 Quick Revision Questions P6 for AQA GCSE...
Transcript of C1 Quick Revision Questions - WordPress.com · P6 Quick Revision Questions P6 for AQA GCSE...
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P6 Quick Revision Questions
P6 for AQA GCSE examination 2018 onwards
H = Higher tier only
SS = Separate science only
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Question 1
• Define wavelength
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P6 for AQA GCSE examination 2018 onwards
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• The distance from a point on one wave to the equivalent point on the adjacent wave. Measured in m
Answer 1 .... of 50
P6 for AQA GCSE examination 2018 onwards
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Question 2
Define frequency
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P6 for AQA GCSE examination 2018 onwards
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• The number of complete waves passing a point in 1 second
Answer 2 .... of 50
P6 for AQA GCSE examination 2018 onwards
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Question 3
• Give the wave equation
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P6 for AQA GCSE examination 2018 onwards
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v = f λ
Answer 3 .... of 50
P6 for AQA GCSE examination 2018 onwards
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Question 4 .... of 50
P6 for AQA GCSE examination 2018 onwards
What type of waves are ripples on water?
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Transverse wave
Answer 4 .... of 50
P6 for AQA GCSE examination 2018 onwards
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Question 5
• Describe a longitudinal wave
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• The vibrations of the particles are parallel to the direction of the energy transfer
Answer 5 .... of 50
P6 for AQA GCSE examination 2018 onwards
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Question 6
• Describe compressions and rarefractions
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P6 for AQA GCSE examination 2018 onwards
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Compression – waves bunch up
Rarefraction – waves spread out
Answer 6 .... of 50
P6 for AQA GCSE examination 2018 onwards
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Question 7
• Why can’t sound waves travel in a vacuum?
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P6 for AQA GCSE examination 2018 onwards
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Longitudinal waves travel by passing the vibrations from one particle to another
Answer 7 .... of 50
P6 for AQA GCSE examination 2018 onwards
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Question 8
• What does amplitude measure?
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P6 for AQA GCSE examination 2018 onwards
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• The height of a wave above or below its rest point
Answer 8 .... of 50
P6 for AQA GCSE examination 2018 onwards
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Question 9
• Give an example of echo sounding
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P6 for AQA GCSE examination 2018 onwards
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Ships using high frequency sound waves to find the depth of the seabed or to locate a shoal of
fish
Answer 9 .... of 50
P6 for AQA GCSE examination 2018 onwards
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Question 10
• A ship sends out a sound wave and receives an echo after 4 seconds. The speed of sound in water is 1500 m/s. How deep is the water?
• Time for sound to reach the sea bed = 2 seconds
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P6 for AQA GCSE examination 2018 onwards
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Answer 10 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Speed = distance/time
• Distance = speed x time
• = 1500 m/s x 2s
• = 3000 m
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Question 11
• What piece of equipment is used to study waves?
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P6 for AQA GCSE examination 2018 onwards
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Answer 11 .... of 50
P6 for AQA GCSE examination 2018 onwards
• A ripple tank
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Question 12
• Define the incident ray and the reflected ray on a ray diagram
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P6 for AQA GCSE examination 2018 onwards
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Answer 12 .... of 50
P6 for AQA GCSE examination 2018 onwards
Incident ray = the ray coming in from the wave source to the surface
Reflected ray = the ray coming away from the surface
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Question 13
• Give the law of reflection
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P6 for AQA GCSE examination 2018 onwards
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Answer 13 .... of 50
P6 for AQA GCSE examination 2018 onwards
When a wave is reflected off a surface, the angle of incidence is equal to the angle of reflection
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Question 14
• Define refraction
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P6 for AQA GCSE examination 2018 onwards
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Answer 14 .... of 50
P6 for AQA GCSE examination 2018 onwards
When a wave changes direction and enters a different medium
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Question 15
• What is the difference between a specular reflection and a diffuse reflection?
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Answer 15 .... of 50
P6 for AQA GCSE examination 2018 onwards
Specular = smooth surfaces
Diffuse = rough surfaces
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Question 16
• What is the typical range for human hearing?
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P6 for AQA GCSE examination 2018 onwards
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Answer 16 .... of 50
P6 for AQA GCSE examination 2018 onwards
• 20Hz – 20kHz
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Question 17
• Why does sound travel faster in solids?
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P6 for AQA GCSE examination 2018 onwards
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Answer 17 .... Of 50
P6 for AQA GCSE examination 2018 onwards
• The particles are packed more tightly together
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Question 18
• How do sound waves travel?
.... of 50 SS
P6 for AQA GCSE examination 2018 onwards
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Answer 18 .... of 50
P6 for AQA GCSE examination 2018 onwards
• As vibrations
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Question 19
• What is ultrasound?
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P6 for AQA GCSE examination 2018 onwards
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Answer 19 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Soundwaves with a frequency above 20kHz
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Question 20
• Why are ultrasound scans used in medicine?
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P6 for AQA GCSE examination 2018 onwards
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Answer 20 .... of 50
P6 for AQA GCSE examination 2018 onwards
They have low energy and don’t damage living cells (unlike x-rays)
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Question 21
• Why is gel used when a person has an ultrasound scan?
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P6 for AQA GCSE examination 2018 onwards
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Answer 21 .... of 50
P6 for AQA GCSE examination 2018 onwards
• To prevent the ultrasound being reflected at the skin, therefore giving a good image of the
internal structure
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Question 22
• How do earthquakes happen? What are the shockwaves called that pass through the Earth
and travel around its surface?
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P6 for AQA GCSE examination 2018 onwards
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Answer 22 .... of 50
P6 for AQA GCSE examination 2018 onwards
• When two parts of the Earth’s crust slide past each other suddenly at a fault
• Seismic waves
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Question 23
• What are the two types of seismic waves?
.... of 50 SS
P6 for AQA GCSE examination 2018 onwards
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Answer 23 .... of 50
P6 for AQA GCSE examination 2018 onwards
• P-wave = primary (pressure) wave, longitudinal, similar to a sound wave, speed increases with the depth in the Earth and is
slower in liquids than solids
• S-wave = secondary (shear), transverse wave, speed increases with the depth in the Earth (always less than P waves) and cannot travel
through liquids
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Question 24
• Why are electromagnetic waves different from other waves?
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P6 for AQA GCSE examination 2018 onwards
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Answer 24 .... of 50
P6 for AQA GCSE examination 2018 onwards
• They do not need a material
• Able to travel through a vacuum
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Question 25
• What is the wave type with the shortest wavelength in the electromagnetic spectrum?
.... of 50
P6 for AQA GCSE examination 2018 onwards
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Answer 25 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Gamma rays
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Question 26
• What does it mean when a wave has a higher frequency?
.... of 50
P6 for AQA GCSE examination 2018 onwards
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Answer 26 .... of 50
P6 for AQA GCSE examination 2018 onwards
• It can transfer more energy to another object when the radiation is absorbed
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Question 27
• Are shorter or longer wavelength waves more dangerous?
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P6 for AQA GCSE examination 2018 onwards
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Answer 27 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Shorter wavelengths
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Question 28
• What is a wavefront?
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P6 for AQA GCSE examination 2018 onwards
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Answer 28 .... of 50
P6 for AQA GCSE examination 2018 onwards
• A line that joins all the points on a wave which are moving up and down together at the same time
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Question 29
• What is the half life of technetium-99m and why is this important?
.... of 50
P6 for AQA GCSE examination 2018 onwards
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Answer 29 .... of 50
P6 for AQA GCSE examination 2018 onwards
• 6 hours
• It stays in the body long enough for diagnosis but not long enough to cause lasting damage
to cells
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Question 30
• What is the key difference between gamma rays and X-rays?
.... of 50
P6 for AQA GCSE examination 2018 onwards
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Answer 30 .... of 50
P6 for AQA GCSE examination 2018 onwards
• How they are produce
• Gamma rays – emitted from the nucleus of an unstable atom during radioactive decay
• X-rays – generated by an x-ray machine when high speed electrons collide with metals and
lose energy
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Question 31
• Give one use of ultraviolet radiation
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P6 for AQA GCSE examination 2018 onwards
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Answer 31 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Fluorescent lighting
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Question 32
• Why can small doses of UV rays be good for you but large doses harmful?
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P6 for AQA GCSE examination 2018 onwards
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Answer 32 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Small doses = production of vitamin D
• Too much = wrinkles and dark pigmentation spots (premature ageing), harmful to the eyes
and even sometimes skin cancer
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Question 33
• Describe the absorption of infrared radiation by food
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P6 for AQA GCSE examination 2018 onwards
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Answer 33 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Energy from infrared radiation is absorbed by the particles on the surface of the food
• They vibrate more and energy can then be transferred slowly by conduction to the food
below the surface
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Question 34
• What device can be used to detect low levels of infrared radiation from warm objects?
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P6 for AQA GCSE examination 2018 onwards
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Answer 34 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Thermal imaging cameras
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Question 35
• How in an experiment can you compare different surfaces to see which is better at
absorbing infrared radiation?
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P6 for AQA GCSE examination 2018 onwards
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Answer 35 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Set up 2 metal plates, either side of a heater
• One with a shiny surface, the other blackened
• Stick a glass stopper on the back of each plate with wax
• After a few minutes one of the stoppers will drop off (the one that absorbs the most
infrared radiation first)
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Question 36
• What are microwaves?
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P6 for AQA GCSE examination 2018 onwards
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Answer 36 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Radio waves with short wavelengths
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Question 37
• Give two uses of microwaves
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P6 for AQA GCSE examination 2018 onwards
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Answer 37 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Communication
• Cooking
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Question 38
• How do microwaves heat food?
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P6 for AQA GCSE examination 2018 onwards
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Answer 38 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Microwaves penetrate the outer layers of food by about 1cm
• Energy transferred by the microwaves makes water or fat molecules in the outer layers of
the food vibrate more
• Energy is transferred from the vibrating water/fat to the centre of the food by
conduction
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Question 39
• How does radar work?
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P6 for AQA GCSE examination 2018 onwards
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Answer 39 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Sends out microwave pulses from a transmitter mounted on the aircraft
• Microwaves reflect from a metal target
• Reflected microwaves are detected by the radar system’s receiving antenna
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Question 40
• How can radio waves be produced?
.... of 50
P6 for AQA GCSE examination 2018 onwards
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Answer 40 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Oscillations in electrical circuits
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Question 41
• Where are radio waves refracted so it returns to the earth surface?
.... of 50
P6 for AQA GCSE examination 2018 onwards
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Answer 41 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Ionosphere
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Question 42
• Define opaque
.... of 50 SS
P6 for AQA GCSE examination 2018 onwards
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Answer 42 .... of 50 SS
P6 for AQA GCSE examination 2018 onwards
• An object that doesn’t allow light to travel through it
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Question 43
• Describe a convex lens
.... of 50 SS
P6 for AQA GCSE examination 2018 onwards
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Answer 43 .... of 50 SS
P6 for AQA GCSE examination 2018 onwards
• Narrow at the outside and bulges in the middle
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Question 44
• What does a concave lens do?
.... of 50 SS
P6 for AQA GCSE examination 2018 onwards
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Answer 44 .... of 50 SS
P6 for AQA GCSE examination 2018 onwards
• Makes rays move away from each other
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Question 45
• How is a virtual image produced?
.... of 50 SS
P6 for AQA GCSE examination 2018 onwards
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Answer 45 .... of 50
P6 for AQA GCSE examination 2018 onwards
• When an object is placed between the principal focus and a convex lens
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Question 46
• Give the equation for magnification
.... of 50 SS
P6 for AQA GCSE examination 2018 onwards
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Answer 46 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Magnification = image height/object height
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Question 47
• A lens is used to focus an image of person 1.76m tall onto a white wall. The image on the wall is 1.9cm tall. Calculate the magnification
produced by the lens
.... of 50 SS
P6 for AQA GCSE examination 2018 onwards
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Answer 47 .... of 50
P6 for AQA GCSE examination 2018 onwards
= 190/1.76
= 107.95
• Magnification = image height/object height
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Question 48
• What sort of surfaces are poor at absorbing and emitting infrared radiation?
.... of 50 SS
P6 for AQA GCSE examination 2018 onwards
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Answer 48 .... of 50 SS
P6 for AQA GCSE examination 2018 onwards
• White, shiny surfaces
• Hence why in hot countries, houses are often painted white to keep them cool inside
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Question 49
• How can the temperature of the Earth be altered?
.... of 50 SS
P6 for AQA GCSE examination 2018 onwards
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Answer 49 .... of 50
P6 for AQA GCSE examination 2018 onwards
• Change rates of absorption, emission and reflection of radiation
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Question 50
• Work out the period of a wave when the frequency is 15000 Hz
.... of 50
P6 for AQA GCSE examination 2018 onwards
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Answer 50 .... of 50
P6 for AQA GCSE examination 2018 onwards
• T = 1/f
• T = 0.000067 s