The aim of this experiment is to determine the density of a metre rule. Proceed as follows: (a) Locate the centre of gravity C of the metre rule AB by balancing freely at the knife edge. (b) Suspend I100 g mass on the ruler with distance d = 10 cm from C, adjust the position of the knife edge to get a balance, as shown in the following figure: y -X- A B C 100 gm Table (c) Record the distance y from the centre of gravity to a knife edge and distance x from knife edge to the known mass of 100 g. (d) Repeat the procedures in 1 (b) and (c) by increasing the distance of 100 g to d = 15 cm, 20 cm, 25 cm and 30 cm. Questions ) Tabulate your results in a suitable table showing the values of d, x and y. (ii) Plot a graph of y (cm) against x (cm). (ii) Determine the slope of the graph. iv) Describe how the slope obtained from the graph is related to the mass of the metre rule provided and hence determine the mass of a ruler. (V) Measure and record the length, width and the thickness of the metre rule provided. (vi) Determine the density of a metre rule.

1. Tabulate your results in a suitable table showing the values of d, x and y. (0 mk)
2. Plot a graph of y (cm) against x (cm). (0 mk)
3. Determine the slope of the graph. (0 mk)
4. Describe how the slope obtained from the graph is related to the mass of the metre rule provided and hence determine the mass of a ruler. (0 mk)
5. Measure and record the length, width and the thickness of the metre rule provided. (0 mk)
6. Determine the density of a metre rule. (0 mk)

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You are provided with a dry cell, resistance box, switch, an anmmeter and a set of connecting Wires. Proceed as follows: (a) Conncct the given electrical components in series, switch must be open. Draw and label clearly your circuit. Find this aPnda goteh e2r f roeef 3re sources at: https://m.t.org (b) Set resistance R = I Q, then chltotpsse:/ /mthaekt asbwa.tiettceha..o rgRead and record the ammeter reading Open the switch immediately after taking the readings. (c) Repeat the procedures in 2 (b), setting the value of R 2, 3 2, 4 2 and 5 2. Questions ) Tabulate your results includingt he values of (i) Plot a graph of R against ii) From the graph, determine the slope and the vertical intercept. (iv) Use the results obtained in 2 (iii) to determine the internal resistance and e.m.f of a given dry cell. What is the aim of doing this experiment? (v)

1. Connect the given electrical components in series, switch must be open. Draw and label clearly your circuit. (0 mk)
2. Set resistance R = I Ω, then close the switch, make the switch, read and record the ammeter reading. Open the switch immediately after taking the readings. (0 mk)
3. Repeat the procedures in 2 (b), setting the value of R 2, 3 Ω, 4 Ω and 5 Ω. (0 mk)
4. Tabulate your results including the values of R and I. (0 mk)
5. Plot a graph of R against I. (0 mk)
6. From the graph, determine the slope and the vertical intercept. (0 mk)
7. Use the results obtained in 2 (iii) to determine the internal resistance and e.m.f of a given dry cell. (0 mk)
8. What is the aim of doing this experiment? (0 mk)

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