Theory

CH11 - ATOMS AND RADIOACTIVITY

The table below gives details about some radioactive substances.[Table_1](a) Which of these substances has the greatest number of particles in the nuc...

2012 Summer

5

Theory

CH11 - ATOMS AND RADIOACTIVITY

The apparatus for investigating the absorption of the emissions from a radioactive source is shown in Fig. 11.1.The source and detector are about 2 cm...

2012 Winter

2

Theory

CH11 - ATOMS AND RADIOACTIVITY

(a) The symbol for an $\alpha$-particle is either $^4_2\alpha$ or $^4_2\text{He}$.(i) What does the 4 indicate about an $\alpha$-particle?...............

2012 Winter

2

Theory

CH11 - ATOMS AND RADIOACTIVITY

(a) Complete the following definition of radioactive half-life.The half-life of a radioactive substance is the time taken for ...........................

2011 Summer

2

Theory

CH11 - ATOMS AND RADIOACTIVITY

The following table includes some of the properties of alpha, beta and gamma radiations.Complete the table by filling in the missing properties.[Table...

2009 Summer

3

Theory

CH11 - ATOMS AND RADIOACTIVITY

(a) A particular radioactive source is known to emit either $\alpha$-particles or $\beta$-particles.Describe an experiment involving a solid absorber ...

2012 Summer

2

Theory

CH11 - ATOMS AND RADIOACTIVITY

Fig. 12.1 represents a neutral atom.(a) What name do we give to(i) the central mass, ....................................................................

2012 Summer

4

Theory

CH11 - ATOMS AND RADIOACTIVITY

The count-rate from a sample of radioactive material is investigated by a team of scientists in a laboratory.(a) With the radioactive sample in place,...

2011 Winter

2

Theory

CH11 - ATOMS AND RADIOACTIVITY

(a) Complete the plot of the decay curve, for times up to $t = 12$ minutes. Draw the best curve through your points. [3](b) From your graph find:(i) t...

2009 Winter

2

Theory

CH11 - ATOMS AND RADIOACTIVITY

(a) What is meant by \textit{radioactive decay}? ................................................................. ....................................

2012 Winter

2

MCQ

CH1 - MEASUREMENTS AND UNITS

The diagram shows an enlarged drawing of the end of a metre rule. It is being used to measure the length of a small feather. What is the length of the...

2016 Summer

4

MCQ

CH2 - FORCES AND MOTION

A train begins a journey from a station and travels 60 km in a time of 20 minutes. What is the average speed of the train?

2016 Summer

1

MCQ

CH2 - FORCES AND MOTION

Two runners take part in a race. The graph shows how the speed of each runner changes with time. What does the graph show about the runners at time $...

2016 Summer

3

MCQ

CH2 - FORCES AND MOTION

A cup contains hot liquid. Some of the liquid evaporates. What happens to the mass and what happens to the weight of the liquid in the cup?

2016 Summer

1

MCQ

CH2 - FORCES AND MOTION

An object has a mass of 50 kg.The gravitational field strength on Earth is $10.0 \text{ N/kg}$.The gravitational field strength on a distant planet is...

2016 Summer

2

MCQ

CH1 - MEASUREMENTS AND UNITS

A student wishes to determine the density of an irregularly-shaped stone. First he finds the mass of the stone. Next he lowers the stone into a measur...

2016 Summer

3

MCQ

CH2 - FORCES AND MOTION

Which is an example of a force?

2016 Summer

1

MCQ

CH3 - FORCES AND PRESSURE

The diagram shows an object of weight $W$ and an object of weight $Z$ balanced on a uniform metre rule. Which equation relating to $W$, $Z$, $a$ and $...

2016 Summer

1

MCQ

CH4 - FORCES AND ENERGY

A skier walks from the bottom of a ski slope to the top and gains 10 000 J of gravitational potential energy.She skis down the slope. At the bottom of...

2016 Summer

3

MCQ

CH4 - FORCES AND ENERGY

A coal-fired power station generates electricity. Coal is burnt and the energy released is used to boil water. The steam from the water makes the gene...

2016 Summer

3