Theory

CH12 - THERMAL PROPERTIES OF MATERIALS

When a liquid is boiling, thermal energy must be supplied in order to maintain a constant temperature. (a) State two processes for which thermal ener...

2009 Summer

Theory

CH12 - THERMAL PROPERTIES OF MATERIALS

(a) A student states, quite wrongly, that temperature measures the amount of thermal energy (heat) in a body. State and explain two observations that...

2009 Winter

Theory

CH12 - THERMAL PROPERTIES OF MATERIALS

(a) State what is meant by the internal energy of a gas. (b) The first law of thermodynamics may be represented by the equation $$\Delta U = q + w.$...

2009 Winter

Theory

CH12 - THERMAL PROPERTIES OF MATERIALS

(a) Some gas, initially at a temperature of 27.2°C, is heated so that its temperature rises to 38.8°C. Calculate, in kelvin, to an appropriate...

2010 Summer

Theory

CH12 - THERMAL PROPERTIES OF MATERIALS

(a) (i) State the basic assumption of the kinetic theory of gases that leads to the conclusion that the potential energy between the atoms of an ideal...

2010 Winter

Theory

CH12 - THERMAL PROPERTIES OF MATERIALS

(a) The first law of thermodynamics may be expressed in the form $$\Delta U = q + w.$$ Explain the symbols in this expression.  [3] + $\Delta...

2011 Summer

Theory

CH12 - THERMAL PROPERTIES OF MATERIALS

(a) The first law of thermodynamics may be expressed in the form $\Delta U = q + w$. Explain the symbols in this expression.  [3] + $\Delta U...

2011 Summer

Theory

CH12 - THERMAL PROPERTIES OF MATERIALS

(a) One assumption of the kinetic theory of gases is that gas molecules behave as if they are hard, elastic identical spheres. State two other assumpt...

2011 Winter

Theory

CH12 - THERMAL PROPERTIES OF MATERIALS

(a) One assumption of the kinetic theory of gases is that gas molecules behave as if they are hard, elastic identical spheres. State two other assump...

2011 Winter

Theory

CH12 - THERMAL PROPERTIES OF MATERIALS

(a) Define specific latent heat.  [2] (b) The heater in an electric kettle has a power of 2.40 kW. When the water in the kettle is boiling at a...

2012 Summer

Theory

CH2 - MEASUREMENT TECHNIQUES

Measurements made for a sample of metal wire are shown in Fig. 1.1. Fig. 1.1 (a) State the appropriate instruments used to make each of these meas...

2011 Summer

Theory

Kinetic Energy

(a) Explain what is meant by work done. [1] (b) A car is travelling along a road that has a uniform downhill gradient, as shown in Fig. 2.1. ...

2011 Summer

Theory

CH5 - FORCES, DENSITY & PRESSURE

(a) Explain what is meant by centre of gravity. (b) Define moment of a force. (c) A student is being weighed. The student, of weight $W$, stands 0.3...

2011 Summer

Theory

CH9 - DEFORMATION OF SOLIDS

(a) Define, for a wire, (i) stress,    [1] (ii) strain.    [1] (b) A wire of length 1.70 m hangs vertically from a fixed point,...

2011 Summer

Theory

CH20 - D.C. CIRCUITS

(a) A variable resistor is used to control the current in a circuit, as shown in Fig. 5.1. The variable resistor is connected in series with a 12V po...

2011 Summer

Theory

CH5 - FORCES, DENSITY & PRESSURE

(a) State two assumptions of the simple kinetic model of a gas.   [2] (b) Use the kinetic model of gases and Newton's laws of motion to exp...

2011 Summer

Theory

CH15 - SUPERPOSITION

(a) Explain the term interference.   [1] (b) A ripple tank is used to demonstrate interference between water waves. Describe (i) the appa...

2011 Summer

Theory

CH1 - PHYSICAL QUANTITIES & UNITS

(a) Distinguish between scalar quantities and vector quantities. [2] (b) In the following list, underline all the scalar quantities. accelerati...

2011 Summer

Theory

CH1 - PHYSICAL QUANTITIES & UNITS

(a) A sphere of radius $R$ is moving through a fluid with constant speed $v$. There is a frictional force $F$ acting on the sphere, which is given by ...

2011 Summer

Theory

Potential Energy

(a) (i) Explain what is meant by work done. [1] (ii) Define power. [1] (b) Fig. 3.1 shows part of a fairground ride with a carriage on rai...

2011 Summer