No questions found
Very small values of which quantity are measured using a micrometer screw gauge?
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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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529
On the Moon, all objects fall with the same acceleration. Which statement explains this?
570
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510
A measuring cylinder contains 30 cm\(^3\) of a liquid.
Some more of the liquid is added until the liquid level reaches the 50 cm\(^3\) mark.
The reading on the balance increases by 30 g.
What is the density of the liquid?
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510
An object moves at constant speed around a circular path. Which statement is correct?
557
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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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The diagram shows two forces acting at right angles to each other.
What is the resultant of the two forces?
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Which statement describes the impulse acting on an object?
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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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A tennis ball is dropped from position 1. It falls vertically onto a hard surface at position 2.
Which energy changes have taken place between position 1 and position 2?
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A boy holds onto a bar and pulls himself up until his chin is level with the bar. He raises himself through 40 cm in 0.5 s. The weight of the boy is 500 N. What is the average power he produces as he raises himself?
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The diagram shows a deep reservoir formed by a dam. On what does the pressure at X depend?
561
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The conditions of a sample of gas change in two stages.
stage 1 increase of temperature at constant volume
stage 2 increase of volume with no further change of temperature
Which row about the pressure after each stage is correct?
[Table_1]
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556
Small pollen particles are suspended in water.
When viewed with a microscope, the pollen particles can be seen to be moving about irregularly.
What causes this movement?
572
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551
The diagram shows a liquid-in-glass thermometer.
Which physical property of the thermometer is used to measure temperature?
516
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A block of lead of mass 500 g is at its melting point.
The specific latent heat of fusion of lead = 23 kJ/kg.
How much energy is required to completely melt the block?
597
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581
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?
564
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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?
551
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517
Four cubic copper containers are filled with water. The surfaces of all the containers are painted black.
Two of the containers have sides of length 20 cm and the other two containers have sides of length 40 cm.
Two of the containers contain water at 80°C and the other two contain water at 30°C.
Which container radiates energy at the lowest rate?
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The diagram shows a wave.
Which row is correct?
551
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The water wave shown has a frequency of 4.0 Hz.
What is the speed of the wave?
524
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558
A student uses one eye to look at images in a plane mirror.
Objects are placed on the line XY. Which objects give rise to images that can be seen by the eye at E?
545
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An object is placed in front of a converging lens of focal length 15 cm.
Which row describes the image of the object?
[Table_1]
564
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515
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?
512
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Which type of waves are produced by a television remote controller?
520
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588
Which statement correctly compares radio waves and X-rays?
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582
The diagram shows the magnetic fields around three objects, P, Q, and R, placed close to each other.
Which row shows the nature of each of the objects?
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A negatively charged rod is brought near to an uncharged metal sphere that is placed on an insulating stand.
[Image_1: metal sphere on an insulating stand]
Which diagram shows the distribution of charges on the sphere?
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A resistor has a potential difference (p.d.) of 12 V across it and a current of 0.60 A in it.
What is the resistance of the resistor?
582
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There is a current $I$ in a resistor of resistance $R$ for a time $t$. The potential difference (p.d.) across the resistor is $V$.
Which equation gives the power $P$ dissipated in the resistor?
585
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600
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?
526
506
512
The diagram shows a battery connected to a potential divider and to two lamps, P and Q.
The slider on the potential divider is moved from end X to end Y of the resistor.
Which row shows the effect on the brightness of each lamp?
583
529
590
What is the truth table for the logic gate shown by the symbol?
568
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527
A coil XY is wound around a cardboard tube.
When the S pole of a magnet is pushed into the coil XY, the galvanometer deflects to the left.
What other movement of the magnet will produce a deflection to the left?
503
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590
Which transformer can change a 240V a.c. input into a 15V a.c. output?
547
545
578
The diagram shows a current-carrying wire in a magnetic field.
In which direction is the force acting on the wire?
539
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599
A scientist was asked to separate the following equations into two categories: nuclear fission and nuclear fusion.
1. $^{239}_{94}\text{Pu} \rightarrow ^{112}_{46}\text{Pd} + ^{124}_{48}\text{Cd} + 3^{1}_{0}\text{n}$
2. $^{3}_{2}\text{He} + ^{3}_{2}\text{He} \rightarrow ^{4}_{2}\text{He} + ^{1}_{1}\text{H} + ^{1}_{1}\text{H}$
3. $^{14}_{7}\text{N} + ^{1}_{1}\text{H} \rightarrow ^{15}_{8}\text{O}$
4. $^{235}_{92}\text{U} \rightarrow ^{90}_{36}\text{Kr} + ^{143}_{56}\text{Ba} + 2^{1}_{0}\text{n}$
Which equations show nuclear fission?
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Which radioactive source is used in a smoke alarm system and what is the reason for this?
[Table_1]
572
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599
A beam of $\alpha$-particles and $\beta$-particles is incident at right angles to an electric field. Which statement about the deflection of the particles in the field is correct?
584
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500
