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 a stone of irregular shape. Which property of the stone can be found by lowering it into a measuring cylinder half-filled with wat...

2021 Summer

2

MCQ

CH2 - FORCES AND MOTION

Two stones of different weights fall at the same time from a table. Air resistance may be ignored. What will happen and why? [Table_1]

2021 Summer

2

MCQ

CH2 - FORCES AND MOTION

The distance–time graph for a motorway journey is shown. What is the average speed for the journey?

2021 Summer

3

MCQ

CH2 - FORCES AND MOTION

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...

2021 Summer

2

MCQ

CH2 - FORCES AND MOTION

On Mars, the acceleration of free fall $g$ is $3.7\, \text{m/s}^2$.What is the weight of a $2.0\, \text{kg}$ mass on Mars?

2021 Summer

4

MCQ

CH2 - FORCES AND MOTION

The mass of an empty flask is 34 g.The volume of liquid added to the flask is 20 cm3.The total mass of the flask and the liquid is 50 g.What is the de...

2021 Summer

2

MCQ

CH2 - FORCES AND MOTION

The diagram shows a solid object on a flat surface, with two forces acting on the object. What is the resultant force on the object?

2021 Summer

2

MCQ

CH2 - FORCES AND MOTION

The extension–load graph for a spring is shown. The unstretched length of the spring is 17.0 cm. [Graph Image] When an object is suspended from the ...

2021 Summer

2

MCQ

CH4 - FORCES AND ENERGY

Which situation involves no work being done and no energy being transferred?

2021 Summer

3

MCQ

CH4 - FORCES AND ENERGY

A student suggests that there are several ways of transferring energy to a small, stationary block of iron on a smooth table. He makes the following s...

2021 Summer

2