i) To make and break the contact or circuit. It bends when the temperature increases and straightens when the temperatures reduces
ii) When the switch is closed, the current o flow, heating takes place and the temperature of strip rises making it to bend away from contact disconnecting the heater. the temperature drops and the strip straightens completing the circuit
OR
(i) Acts as a thermostat
(ii) On closing, the switch, current becomes complete, the current flows causing heating effect,
the bimetallic strip bends downwards and contents separates.
when the room becomes cool the strip bends upward completing the current and the process
repeats itself on and off regulating the temperature
johnmulu answered the question on April 13, 2017 at 13:25
- Figure 3 shows the arrangement of molecules in the three states of matter(Solved)
Figure 3 shows the arrangement of molecules in the three states of matter
a) Name the process represented by the arrow.
b) State the reason for the arrangement of molecules in state 3.
Date posted: April 13, 2017. Answers (1)
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Date posted: April 13, 2017. Answers (1)
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Date posted: April 13, 2017. Answers (1)
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Date posted: April 13, 2017. Answers (1)
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Figure 14 shows a lift pump.
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(ii) Pushed downwards, valve A closes while valve B opens
Date posted: April 13, 2017. Answers (1)
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Date posted: April 13, 2017. Answers (1)
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Date posted: April 13, 2017. Answers (1)
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Date posted: April 13, 2017. Answers (1)
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Date posted: April 13, 2017. Answers (1)
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Figure 6 (a) and 6 (b) shows capillary tubes inserted in water and mercury respectively
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Date posted: April 13, 2017. Answers (1)
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Figure 6 shows a small toy boat floating on water in a basin. X and Y are two points near the toy.
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Date posted: April 13, 2017. Answers (1)
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Figure 8 shows water drops on two surfaces. In figure 8 (a) the glass surface is smeared with wax while in figure 8 (b) the glass surface is clean.
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Date posted: April 13, 2017. Answers (1)
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Give a reason why the level of mercury in the capillary tube is lower than in the beaker
Date posted: April 13, 2017. Answers (1)
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Date posted: April 13, 2017. Answers (1)
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Figure 2 (a) shows the initial reading of burette used to measure the volume of oil. After 50 drops of the oil were run out, the final reading was as shown in figure 2 (b)
Determine the volume of one drop of oil
Date posted: April 13, 2017. Answers (1)
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Determine the reading on the measuring cylinder, after three drops of water each of volume 0.6 cm3 are added.
Date posted: April 13, 2017. Answers (1)
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In an experiment to measure the density of a liquid, a student filled a burette with a liquid to the 0 cm 3 mark. Figure 1 shows a section of the burette showing the level of the liquid after 54.5 g of the liquid had been run out
Determine the density of the liquid
Date posted: April 13, 2017. Answers (1)
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Figure 1 shows the reading on a burette after 55 drops of a liquid have been used.
If the initial reading was at zero mark, determine the volume of one drop.
Date posted: April 13, 2017. Answers (1)
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Date posted: April 13, 2017. Answers (1)
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Fig 1 shows a fencing post whose length is being measured using a strip of a measuring tape
Use this information to answer the questions
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b) What is the length of the post?
Date posted: April 13, 2017. Answers (1)