Theory

CH26 - PARTICLE & NUCLEAR PHYSICS

The spontaneous and random decay of a radioactive substance involves the emission of either $\alpha$-radiation or $\beta$-radiation and/or $\gamma$-ra...

2009 Summer

Theory

CH26 - PARTICLE & NUCLEAR PHYSICS

(a) A sample of a radioactive isotope contains $N$ nuclei at time $t$. At time $(t + \Delta t)$, it contains $(N - \Delta N)$ nuclei of the isotope.Fo...

2009 Summer

MCQ

CH26 - PARTICLE & NUCLEAR PHYSICS

The gold nucleus $^{185}_{79}\text{Au}$ undergoes alpha decay.What are the nucleon (mass) number and proton (atomic) number of the nucleus formed by t...

2009 Winter

MCQ

CH26 - PARTICLE & NUCLEAR PHYSICS

The nuclei of the isotopes of an element all contain the same number of a certain particle. What is this particle?

2009 Winter

MCQ

CH26 - PARTICLE & NUCLEAR PHYSICS

Alpha, beta and gamma radiations1. are absorbed to different extents in solids,2. behave differently in an electric field,3. behave differently in a m...

2009 Winter

MCQ

CH26 - PARTICLE & NUCLEAR PHYSICS

Two $\alpha$-particles with equal energies are fired towards the nucleus of a gold atom. Which diagram best represents their paths?

2009 Winter

Theory

CH26 - PARTICLE & NUCLEAR PHYSICS

An $\alpha$-particle A approaches and passes by a stationary gold nucleus N. The path is illustrated in Fig. 7.1.(a) On Fig. 7.1, mark the angle of de...

2009 Winter

Theory

CH26 - PARTICLE & NUCLEAR PHYSICS

Tungsten-184 \( \left( ^{184}_{74}\text{W} \right) \) and tungsten-185 \( \left( ^{185}_{74}\text{W} \right) \) are two isotopes of tungsten.Tungsten-...

2009 Winter

Theory

CH26 - PARTICLE & NUCLEAR PHYSICS

The controlled reaction between deuterium $\left(\frac{2}{1}H\right)$ and tritium $\left(\frac{3}{1}H\right)$ has involved ongoing research for many y...

2009 Winter

Theory

CH26 - PARTICLE & NUCLEAR PHYSICS

(a) State what is meant by the decay constant of a radioactive isotope...................................................................................

2009 Winter

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

When a force $F$ moves its point of application through a displacement $s$ in the direction of the force, the work $W$ done by the force is given by $...

2012 Summer

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

What is a possible unit for the product $VI$, where $V$ is the potential difference across a resistor and $I$ is the current through the same resistor...

2012 Summer

MCQ

CH1 - PHYSICAL QUANTITIES & UNITS

What is a reasonable estimate of the average kinetic energy of an athlete during a 100 m race that takes 10 s?

2012 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

A light-meter measures the intensity $I$ of the light falling on it. Theory suggests that $I$ varies inversely as the square of the distance $d$. W...

2012 Summer

MCQ

CH2 - MEASUREMENT TECHNIQUES

In an experiment, a radio-controlled car takes $2.50 \pm 0.05$ s to travel $40.0 \pm 0.1$ m. What is the car’s average speed and the uncertaint...

2012 Summer

MCQ

CH3 - KINEMATICS

In an experiment to determine the acceleration of free fall using a falling body, what would lead to a value that is too large?

2012 Summer

MCQ

CH3 - KINEMATICS

Which feature of a graph allows acceleration to be determined?

2012 Summer

MCQ

CH3 - KINEMATICS

The diagram shows a laboratory experiment in which a feather falls from rest in a long evacuated vertical tube of length $L$. The feather takes tim...

2012 Summer

MCQ

CH3 - KINEMATICS

In the absence of air resistance, a stone is thrown from P and follows a parabolic path in which the highest point reached is T. The stone reaches poi...

2012 Summer

MCQ

CH5 - FORCES, DENSITY & PRESSURE

Each option gives a correct word equation involving force. Which option gives the definition of force?

2012 Summer