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

A digital stop-clock measures time in minutes and seconds. The stop-clock reads 00:50 when it is started (i.e. 00 minutes 50 seconds). It reads 02:10 ...

2019 Summer

3

MCQ

CH2 - FORCES AND MOTION

A long-distance runner wishes to calculate her average speed for a race.Which calculation should she use?

2019 Summer

3

MCQ

CH2 - FORCES AND MOTION

A heavy metal ball falls vertically downwards through air past four equally spaced levels J, K, L and M.The times taken to fall from one level to the ...

2019 Summer

3

MCQ

CH2 - FORCES AND MOTION

An arrow travels horizontally in a straight line at constant speed. In which direction does the weight act?

2019 Summer

2

MCQ

CH1 - MEASUREMENTS AND UNITS

Two rectangular blocks consist of different materials.Four different methods are suggested to compare the two masses.1 Compare the accelerations with ...

2019 Summer

2

MCQ

CH1 - MEASUREMENTS AND UNITS

The diagrams show four solid blocks with their dimensions and masses.Which block has the greatest density?

2019 Summer

3

MCQ

CH2 - FORCES AND MOTION

A mass of 20 kg is held stationary by a rope passing over a frictionless pulley. What is the tension $T$ in the rope?

2019 Summer

3

MCQ

CH3 - FORCES AND PRESSURE

A spring is suspended from a stand. Loads are added and the extensions are measured. Which graph shows the result of plotting extension against loa...

2019 Summer

6

MCQ

CH3 - FORCES AND PRESSURE

A wooden bar is pivoted at its centre so that it can rotate freely. Two equal forces $F$ are applied to the bar.In which diagram is the turning effect...

2019 Summer

2

MCQ

CH4 - FORCES AND ENERGY

A machine is very efficient. What does this mean?

2019 Summer

3