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 diagrams show the readings on a measuring cylinder before and after a small metal cube is added.How many more identical cubes can be added to the ...

2013 Summer

2

MCQ

CH2 - FORCES AND MOTION

Which person is experiencing an acceleration?

2013 Summer

2

MCQ

CH2 - FORCES AND MOTION

A car travels at various speeds during a short journey. The table shows the distances travelled and the times taken during each of four stages P, Q, R...

2013 Summer

2

MCQ

CH2 - FORCES AND MOTION

Two blocks of metal X and Y hang from spring balances, as shown in the diagrams. What does the diagram show about X and Y?

2013 Summer

2

MCQ

CH2 - FORCES AND MOTION

A 1 kg sample of aluminium is stored in a laboratory. In a different laboratory, in the same town, there is a 1 kg sample of iron.Which quantity must ...

2013 Summer

2

MCQ

CH1 - MEASUREMENTS AND UNITS

A measuring cylinder has a mass of 120 g when empty. When it contains 50 cm^3 of a liquid, the total mass of the measuring cylinder and the liquid is ...

2013 Summer

3

MCQ

CH2 - FORCES AND MOTION

A car moves along a level road. The diagram shows all of the horizontal forces acting on the car. Which statement is correct?

2013 Summer

2

MCQ

CH3 - FORCES AND PRESSURE

The diagram shows a force being applied to a lever to lift a heavy weight. Which change would enable the heavy weight to be lifted with a smaller forc...

2013 Summer

7

MCQ

CH4 - FORCES AND ENERGY

The diagram shows a hydroelectric system.What are the main energy changes taking place?

2013 Summer

2

MCQ

CH4 - FORCES AND ENERGY

An escalator (moving stairs) and a lift (elevator) are both used to carry passengers from the same underground railway platform up to street level. Th...

2013 Summer

2