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Specific latent heat of vaporization is the quantity of heat required to change 1 kg of a liquid at boiling point completely to vapour at the same temperature and atmospheric pressure.
johnmulu answered the question on February 15, 2017 at 13:57
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State two factors that would raise the boiling point of water to above 100oC
Date posted: February 15, 2017. Answers (1)
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Water of mass 3 kg, at a temperature of 90oC is allowed to cool for 10 minutes. State two factors, other than humidity, that determine the final temperature.
Date posted: February 15, 2017. Answers (1)
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Date posted: February 15, 2017. Answers (1)
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Date posted: February 15, 2017. Answers (1)
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Distinguish between heat capacity and specific heat capacity of a body.
Date posted: February 15, 2017. Answers (1)
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Date posted: February 15, 2017. Answers (1)
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A current I flowing through a wire of resistance R was increased seven times. Determine the factor by which the rate of heat production was increased.
Date posted: February 15, 2017. Answers (1)
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Date posted: February 15, 2017. Answers (1)
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Date posted: February 15, 2017. Answers (1)
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An electric heater is connected to the mains supply. A fault in the mains reduces the supply potential slightly. Explain the effect on the rate of heating of the heater.
Date posted: February 15, 2017. Answers (1)
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An electric bulb is rated 75W, 240V. Determine the resistance of the bulb
Date posted: February 15, 2017. Answers (1)
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An electric bulb with a filament of resistance 480 ohms is connected to a 240 V mains supply. Determine the energy dissipated in 2 minutes
Date posted: February 15, 2017. Answers (1)
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A 60 W bulb is used continuously for 36 hours. Determine the energy consumed. Give your answer in kilowatt hour (kWh)
Date posted: February 15, 2017. Answers (1)
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An electric heater rated 240 V, 3000 W is to be connected to a 240 V mains supply, through a 10 A fuse. Determine whether the fuse is suitable or not
Date posted: February 15, 2017. Answers (1)
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When a current of 2.0 A flows in resistor for 10 minutes, 15, 000 joules of electrical energy is dissipated. Determine the voltage across the resistor.
Date posted: February 15, 2017. Answers (1)
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State three factors that affect the capacitance of a parallel plate capacitor
Date posted: February 15, 2017. Answers (1)
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State the effect of decreasing the distance between the plates of a parallel plate capacitor on the capacitance.
Date posted: February 15, 2017. Answers (1)
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Explain how a positively charged electroscope gets discharged when the cap is touched with a finger.
Date posted: February 15, 2017. Answers (1)
- Light from a lamp falls on the cap of a negatively charged electroscope. It is observed that the divergence of the leaf decreases(Solved)
Light from a lamp falls on the cap of a negatively charged electroscope. It is observed that the divergence of the leaf decreases. Explain the observation
Date posted: February 15, 2017. Answers (1)
- In some petrol engines where sparks plugs are used, a capacitor is connected to the distributor suggest the function of the capacitor(Solved)
In some petrol engines where sparks plugs are used, a capacitor is connected to the distributor suggest the function of the capacitor.
Date posted: February 14, 2017. Answers (1)