Theory

CH11 - ATOMS AND RADIOACTIVITY

A radioactive nucleus contains 138 neutrons. The nucleus emits an \( \alpha \)-particle. How many neutrons are in the nucleus after it has emitted th...

2009 Summer

Theory

CH11 - ATOMS AND RADIOACTIVITY

The graph shows the decay curve for one particular radioactive nuclide. What is the half-life of this nuclide? A. 1.0 day B. 1.5 days C. 2.0 days D. ...

2009 Summer

Theory

CH11 - ATOMS AND RADIOACTIVITY

$^{16}_{7}\text{N}$ is the symbol for a particular nuclide of nitrogen. How many nucleons does this nuclide contain? A 7 B 9 C 16 D 23

2009 Summer

Theory

CH11 - ATOMS AND RADIOACTIVITY

A beam of ionising radiation, containing $\alpha$-particles, $\beta$-particles and $\gamma$-rays, is travelling left to right across the page. A magne...

2009 Summer

Theory

CH11 - ATOMS AND RADIOACTIVITY

Which statement explains the meaning of the half-life of a radioactive substance?A half the time taken for half the substance to decayB half the time ...

2009 Winter

Theory

CH11 - ATOMS AND RADIOACTIVITY

The diagram shows the paths of three different types of radiation, X, Y and Z. Which row in the table correctly identifies X, Y and Z?[Table_1]

2009 Winter

Theory

CH11 - ATOMS AND RADIOACTIVITY

How many neutrons and how many protons are contained in a nucleus of $^{238}_{92}\text{U}$?[Table_1]neutrons | protonsA | 92 | 146B | 146 | 92C | 146 ...

2009 Winter

Theory

CH11 - ATOMS AND RADIOACTIVITY

How many neutrons and how many protons are contained in a nucleus of $^{238}_{92}$U?[Table_1]

2009 Winter

Theory

CH11 - ATOMS AND RADIOACTIVITY

Which statement explains the meaning of the half-life of a radioactive substance?A. half the time taken for half the substance to decayB. half the tim...

2009 Winter

Theory

CH11 - ATOMS AND RADIOACTIVITY

The diagram shows the paths of three different types of radiation, X, Y and Z.Which row in the table correctly identifies X, Y and Z?[Table_1]| | X ...

2009 Winter

Theory

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

Theory

CH2 - FORCES AND MOTION

Which person is experiencing an acceleration?A. a driver of a car that is braking to stop at traffic lightsB. a passenger in a train that is stationar...

2013 Summer

Theory

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

Theory

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? A They have the same mas...

2013 Summer

Theory

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

Theory

CH1 - MEASUREMENTS AND UNITS

A measuring cylinder has a mass of 120g when empty.When it contains 50cm3 of a liquid, the total mass of the measuring cylinder and the liquid is 160g...

2013 Summer

Theory

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?A. The car is slowing down....

2013 Summer

Theory

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

Theory

CH4 - FORCES AND ENERGY

The diagram shows a hydroelectric system. What are the main energy changes taking place?A. chemical energy \(\rightarrow\) kinetic energy \(\rightarro...

2013 Summer

Theory

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.The...

2013 Summer