Physics 9702/43 — October/November 2017

Cambridge A-Level · A Level Structured Questions · worked solutions for every part, with the mark scheme

questions

100

marks

120

minutes

Topics Magnetic Fields · Nuclear Physics · Temperature · Oscillations · Gravitational Fields · Motion in a Circle · +7 more

Q1TemperatureFree sample

Answer all the questions in the spaces provided.

(a)

State

(i)

what may be deduced from the difference in the temperatures of two objects,

(ii)

the basic principle by which temperature is measured.

(b)

By reference to your answer in (a)(ii), explain why two thermometers may not give the same temperature reading for an object.

(c)

A block of aluminium of mass $670\text{ g}$ is heated at a constant rate of $95\text{ W}$ for $6.0\text{ minutes}$ .
The specific heat capacity of aluminium is $910\text{ J kg}^{-1}\text{ K}^{-1}$ .
The initial temperature of the block is $24^{\circ}\text{C}$ .

(i)

Assuming that no thermal energy is lost to the surroundings, show that the final temperature of the block is $80^{\circ}\text{C}$ .

(ii)

In practice, there are energy losses to the surroundings.
The actual variation with time $t$ of the temperature $\theta$ of the block is shown in Fig. 1.1.

Fig. 1.1

Use the information in (i) to draw, on Fig. 1.1, a line to represent the temperature of the block, assuming no energy losses to the surroundings.
Using Fig. 1.1, calculate the total energy loss to the surroundings during the heating process.

energy loss = ______ $\text{J}$

The rest of this paper

11 more questions

Q2Oscillations7M
Q3Gravitational Fields · Motion in a Circle8M
Q4Communication8M
Q5Electric Fields · Magnetic Fields8M
Q6Capacitance8M
Q7Electronics11M
Q8Magnetic Fields8M
Q9Medical Physics7M
Q10Alternating Currents6M
Q11Quantum Physics · Nuclear Physics7M
Q12Nuclear Physics7M

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