Describe how particles are arranged in a solid, a liquid and a gas.
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100
What is meant by the frequency of a wave? What are the units for frequency?
Number of vibrations/number of waves per seconds. It has units of Hertz (Hz).
100
What time of wave is light?
Transverse.
200
What can you find out if you calculate the area under a speed-time graph?
The distance travelled.
200
What are the units for work?
Joules
200
Explain why metals expand when they are heated.
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200
What is the wave equation?
speed = frequency x wavelength
200
What has a shorter wavelength, infra-red or ultraviolet radiation?
Ultraviolet radiation.
300
Ignoring air resistance, if a physics textbook is dropped from a high building, how fast will it be travelling after 3 seconds?
30 m/s
300
What is the principle of equilibrium? (for moments)
The sum of the clockwise moments about any point is equal to the sum of the anticlockwise moments about that point.
300
What happens to the temperature of a gas if you increase the pressure?
It also increases.
300
Describe a longitudinal wave?
It is made up of compressions and rarefactions, particles on the wave oscillate along the direction of travel.
300
How can you calculate the refractive index of a material using the angle of incidence and angle of refraction?
refractive index = sin i / sin r
400
What can you learn from the gradient of a distance time graph?
The acceleration.
400
How would you calculate the power if you know the work done and the time takes?
Power = Work done / time
400
A liquid in glass thermometer has a linear scale. What does "linear scale" mean?
The scale on it has divisions of equal distance apart.
400
What happens to a water wave when it passes through a shallower area?
It slows down and changes direction (refraction).
400
What does a convex lens look like?
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500
What is Newton's First Law of motion?
If no external force is acting on it, an object will remain at rest if it is already at rest, or if moving it will continue to move in a straight line at constant speed.
500
A ball has a mass of 0.5 kg. If it is dropped from a cliff of height 10m, at what speed will it be travelling when it hits the water below? Ignore air resistance!
G.P.E = m g h = 0.5 x 10 x 10 = 50 J
Therefore K.E as it hits the water = 50 J
K.E = 0.5 x m x v^2
So v = 14.1 m/s
500
What is meant by the specific heat capacity of a substance?
The energy needed to increase the temperature of 1kg of the substance by 1 degree Celcius.
500
How far away is the sea bed if it takes an ultrasound pulse 1.2 seconds to be detected again after it is emitted by a ship? The speed of sound in water is 1400 m/s
speed = distance / time
time = 1.2 seconds
speed = 1400 m/s
distance = 1680 m
500
Describe the image produced when an object is placed less than one focal length away from a convex lens. What could this be used for?
Virtual, upright, magnified. It could be used in a magnifying glass.