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 stopwatch is used to time a runner in a race. The diagrams show the stopwatch at the start and at the end of the race. How long did the runner take...

2017 Summer

2

MCQ

CH2 - FORCES AND MOTION

On Earth, a ball is dropped and falls 2.0 m in a vacuum. The acceleration of the ball at 1.0 m is $10 \text{ m/s}^2$. What is the acceleration of the...

2017 Summer

2

MCQ

CH2 - FORCES AND MOTION

The speed-time graph represents a motorcycle journey. In which part of the graph is the acceleration equal to zero? [Image_1: Speed-time graph with ...

2017 Summer

2

MCQ

CH3 - FORCES AND PRESSURE

Diagram 1 shows a sealed plastic bottle containing a hollow glass sphere and a steel ball.Diagram 2 shows the same bottle after it has been shaken.Dia...

2017 Summer

2

MCQ

CH2 - FORCES AND MOTION

A student is weighed on laboratory scales.Which row about weight and mass is correct?[Table_1]

2017 Summer

2

MCQ

CH1 - MEASUREMENTS AND UNITS

A measuring cylinder containing only water is placed on an electronic balance. A small, irregularly shaped stone is now completely immersed in the wat...

2017 Summer

2

MCQ

CH2 - FORCES AND MOTION

A boat is travelling at a steady speed in a straight line across the surface of a lake.Which statement about the boat is correct?

2017 Summer

2

MCQ

CH3 - FORCES AND PRESSURE

The diagram shows three uniform, solid wooden blocks with a square cross-sectional area resting on a horizontal table.Which list puts the blocks in or...

2017 Summer

2

MCQ

CH4 - FORCES AND ENERGY

Energy resources are used to generate electricity.Which resource is renewable and does not release carbon dioxide when being used to produce electrici...

2017 Summer

3

MCQ

CH2 - FORCES AND MOTION

A student does some simple exercises. In which exercise is the most work done?

2017 Summer

2