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What is a micrometer screw gauge used to measure?
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A man stands next to a railway track.
A train travelling at 40 m/s takes 2.0 s to pass the man.
What is the length of the train?
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A skydiver jumps from an aeroplane and falls towards the Earth.
Which statement is correct when the skydiver has reached terminal velocity?
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On the Moon, all objects fall with the same acceleration.
Which statement explains this?
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A measuring cylinder contains 30 cm3 of a liquid.
Some more of the liquid is added until the liquid level reaches the 50 cm3 mark.
The reading on the balance increases by 30 g.
What is the density of the liquid?
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A box of mass 4.0 kg is pulled along a horizontal floor in a straight line by a constant force $F$.
The constant frictional force acting on the box is 2.0 N.
The speed of the box increases from 0.50 m/s to 2.5 m/s in 2.0 s.
What is the value of $F$?
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A beam is pivoted at one end, as shown.
The beam weighs 6.0 N and its weight acts at a point X 40 cm from the pivot.
A force of 4.0 N is applied to the beam causing it to balance horizontally.
In which direction and where is the 4.0 N force applied?
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Two vectors, WX and WZ, are as shown.
What is the resultant of the vectors?
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Which equation for impulse is correct?
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A ball of mass 0.16 kg is moving forwards at a speed of 0.50 m/s. A second ball of mass 0.10 kg is stationary. The first ball strikes the second ball. The second ball moves forwards at a speed of 0.50 m/s.
What is the speed of the first ball after the collision?
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In which form is energy stored by stretching a spring?
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A car moves along a horizontal road. Its initial kinetic energy is 280 kJ. A constant resistive force of 200 N acts on the car. No other horizontal forces act on the car.
What is the kinetic energy of the car after it has travelled a distance of 300 m?
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The diagram shows a deep reservoir formed by a dam. On what does the pressure at X depend?
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The diagram shows gas particles hitting the wall of a container. The system is at room temperature.
Why do the gas particles exert a pressure on the wall?
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A gas in a container is cooled but the volume of the gas does not change.
Which row describes the changes in the pressure of the gas and the kinetic energy of the gas particles?
[Table_1]
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The iron cylinder of an engine is to be fitted into a piece of aluminium.
The outside diameter $M$ of the iron cylinder is slightly larger than the diameter $N$ of the hole in the aluminium.
What is the best action to fit the cylinder into the aluminium?
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Four metal blocks at a temperature of 200 °C are left to cool down to the same temperature.
The table gives the mass of each block and the energy it transfers to the surroundings as it cools.
[Table_1]
Which two blocks are made of the same metal?
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A glass contains an iced drink on a warm and humid day. Water starts to form on the outside of the glass.
What is the name of the effect by which the water forms?
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One end of a copper bar is heated to a high temperature. Which mechanism is responsible for the transfer of thermal energy to the other end of the copper bar?
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An object emits infrared radiation.
Which two properties of the object determine the rate of radiation of thermal energy from the object?
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The diagram shows a wave.
Which row is correct?
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The wavelength of a beam of X-rays, travelling through air, is $5.4 \times 10^{-10}$ m.
What is its frequency?
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A ray of light passes from air through a sheet of glass and out the other side, as shown.
Which two angles are equal to each other?
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A plane mirror is fixed to a vertical wall.
A boy looks at the image of himself in the mirror.
Which statement describes the image formed?
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The speed of light in air is $3.0 \times 10^8 \text{m/s}$.
The critical angle for light in a transparent plastic material placed in air is $37^\circ$.
What is the speed of light in the plastic material?
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A resistor and a battery are connected in series.
The value of the resistor is 20Ω.
The potential difference (p.d.) of the battery is 4.0 V.
What is the current in the resistor?
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Which statement correctly compares radio waves and X-rays?
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A student attempts to make a permanent magnet by hammering metal bars of the same size in the same magnetic field.
In which case is the strongest permanent magnet produced?
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A metal sphere R is suspended on an insulating thread. Another sphere S is brought close to sphere R. Sphere S has a negative charge and is attached to a plastic stand. The diagram shows the spheres when they are close to each other.
Which charged state of R accounts for the behaviour in the diagram?
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A student compares the wavelength and uses of infrared waves with microwaves. Which row is correct? [Table_1]
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There is a current $I$ in a resistor for a time $t$. The potential difference (p.d.) across the resistor is $V$.
A student calculates the product $IVt$.
In which unit is the student’s answer measured?
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Which statement about identical lamps in a parallel circuit is not correct?
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The four circuits shown each contain four diodes.
In which circuit is the direction of the current in the resistor always from the red terminal to the black terminal?
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The truth table for a logic gate is shown.
[Table_1]
Which type of logic gate is it?
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A wire XY is connected to a resistor R. The wire is moved in the magnetic field between two magnetic poles.
In which direction must the wire be moved so that the induced current is in the direction shown?
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Which transformer can change a 240 V a.c. input into a 15 V a.c. output?
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The circuit shown consists of a vertical wire, a resistor R and a battery.
The magnetic field near the wire is also shown.
Two changes are made to the circuit:
• The polarity of the battery is reversed.
• The resistor R is replaced with another resistor with a lower resistance than R.
What effect will these changes have on the magnetic field near the wire?
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Carbon-14 has a proton number (Z) of 6 and a nucleon number (A) of 14.
Nitrogen-14 has a proton number of 7 and a nucleon number of 14.
Carbon-14 emits β-particles to form nitrogen-14.
Which nuclide equation describes this process?
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A beam of radiation, containing $\alpha$-particles, $\beta$-particles and $\gamma$-rays, passes between two parallel plates. One plate is positively charged and the other is negatively charged.
Which radioactive emissions will be attracted towards the positively charged plate?
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A scientist uses a counter to measure the radioactivity of a sample of nitrogen-13. The counter and sample of nitrogen-13 are on a table in a laboratory. The reading on the counter is recorded for a period of 80 min and a graph is drawn using the measurements.
What is the best estimate for the half-life of the sample of nitrogen-13?
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