Ratio of sine of angle of incidence in air to sine of angle of refraction in denser medium is always a constant
chrispohmomanyi answered the question on September 20, 2017 at 07:54
- Why is the metre bridge method a more accurate means of measuring resistance than Ammeter-voltmeter method.(Solved)
Why is the metre bridge method a more accurate means of measuring resistance than Ammeter-voltmeter method.
Date posted: September 20, 2017. Answers (1)
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State one reason why mercury is preferred as a barometric liquid and not water.
Date posted: September 20, 2017. Answers (1)
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Highlight one fact which shows that heat from the sun does not reach the earth's surface by
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Date posted: September 20, 2017. Answers (1)
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speed. Explain(Solved)
A body in a uniform circular motion experiences acceleration despite moving at a constant
speed. Explain
Date posted: September 20, 2017. Answers (1)
- Calculate the length of a wire required to make a resistor of 0.5 ohms, if the receptivity of the
material is 4.9 x 10^-7 ohm m...(Solved)
Calculate the length of a wire required to make a resistor of 0.5 ohms, if the receptivity of the
material is 4.9 x 10^-7 ohm m and the cross sectional area is 2.0 x 10^-8
Date posted: September 19, 2017. Answers (1)
- The activity of a radioactive substance, initially at 400 counts per second reduces to 50 counts per
second in 72 minutes. Determine the half – life...(Solved)
The activity of a radioactive substance, initially at 400 counts per second reduces to 50 counts per
second in 72 minutes. Determine the half – life of the substance
Date posted: September 19, 2017. Answers (1)
- The primary coils of a transformer has 2000 turns and carries a current of 3A. If the secondary coil
is designed to carry a current of...(Solved)
The primary coils of a transformer has 2000 turns and carries a current of 3A. If the secondary coil
is designed to carry a current of 30A, calculate the maximum number of turns in the secondary
coil.
Date posted: September 19, 2017. Answers (1)
- A heating coil rated 1000 W takes 15 minutes to heat 20kg of a liquid from 26^o C of 42^o C.
Determine the specific heat capacity...(Solved)
A heating coil rated 1000 W takes 15 minutes to heat 20kg of a liquid from 26^o C of 42^o C.
Determine the specific heat capacity of the liquid.
Date posted: September 19, 2017. Answers (1)
- Give one example of a semiconductor and one for a conductor
(Solved)
Give one example of a semiconductor and one for a conductor
Date posted: September 19, 2017. Answers (1)
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Distinguish between semiconductor and conductors
Date posted: September 19, 2017. Answers (1)
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Which instrument which can be used to measure the thickness of the hair.
Date posted: September 19, 2017. Answers (1)
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State the accuracy of a vernier caliper.
Date posted: September 19, 2017. Answers (1)
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State the difference between conductors and insulators
Date posted: September 19, 2017. Answers (1)
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Explain why boiling water is not used to sterilize clinical thermometer.
Date posted: September 19, 2017. Answers (1)
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State any two reasons why water is not a suitable thermometric fluid.
Date posted: September 19, 2017. Answers (1)
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State why concrete is usually reinforced with steel in the construction of beams.
Date posted: September 19, 2017. Answers (1)
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Explain why trees bends towards a busy highway.
Date posted: September 19, 2017. Answers (1)
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Differentiate between pressure and force
Date posted: September 19, 2017. Answers (1)
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State any two special rays used in the construction of ray diagrams
Date posted: September 19, 2017. Answers (1)
- Electrons emitted from a metal when light of a certain frequency is shone on the metal are
found to have a maximum energy of 8.0 x...(Solved)
Electrons emitted from a metal when light of a certain frequency is shone on the metal are
found to have a maximum energy of 8.0 x 10-19J. If the work function of the metal is 3.2 x 10-19J,
determine the wavelength of the light used.
Date posted: September 19, 2017. Answers (1)