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Mass = 50 x 0.8 = 40g
Reading = 25 + 40 = 65g
Kavungya answered the question on May 30, 2019 at 13:51
- The figure shows a piece of cork held with a light thread attached to the bottom of a beaker. The beaker is filled with
water.
i) Indicate...(Solved)
The figure shows a piece of cork held with a light thread attached to the bottom of a beaker. The beaker is filled with
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Date posted: May 30, 2019. Answers (1)
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Date posted: May 30, 2019. Answers (1)
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Date posted: May 30, 2019. Answers (1)
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State and explain what would be observed.(Solved)
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Date posted: May 30, 2019. Answers (1)
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Sketch on the figure the path followed by the ball if the string cuts...(Solved)
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Date posted: May 30, 2019. Answers (1)
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Date posted: May 30, 2019. Answers (1)
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The figure shows an instrument used to measure atmospheric pressure.
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Date posted: May 30, 2019. Answers (1)
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Date posted: May 30, 2019. Answers (1)
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The figure below shows a section of a vernier calliper scale.
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Date posted: May 30, 2019. Answers (1)
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Assuming...(Solved)
A radioactive element X of half-life of 28 days decay to element Y. A sample of X of mass 16g is kept in a container.
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Date posted: May 30, 2019. Answers (1)
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Date posted: May 30, 2019. Answers (1)
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Date posted: May 30, 2019. Answers (1)
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A house has four lamps rated (60W, 240V), a cooker rated (5kw, 240V), and an iron box rated (1kW, 240V). All are used 3.5 hours a day. Calculate the monthly cost for electricity for the owner at the rate of 13.5 cents/ KWhr.
Date posted: May 30, 2019. Answers (1)
- Figure below shows a simple barometer.
a) What is the region A?
b) What keeps the mercury in the tube?
c) What is the value of the...(Solved)
Figure below shows a simple barometer.
a) What is the region A?
b) What keeps the mercury in the tube?
c) What is the value of the atmospheric pressure being shown by the barometer?
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e) Give a reason for (d) above.
Date posted: May 30, 2019. Answers (1)
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The thimble of the micrometer screw gauge is rotated through two and half revolutions in...(Solved)
The diagram below shows a section of a micrometer screw gauge.
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Date posted: May 30, 2019. Answers (1)
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The primary coil of a transformer has 1200 turns and the secondary coil has 60 turns. The transformer is connected to a 240V a.c source.
i) The output voltage.
ii) The output current when the primary coil has a current of 0.5A (Assume there is no energy losses)
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Date posted: May 30, 2019. Answers (1)
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clapped two...(Solved)
In an experiment to determine the speed of sound, an observer stood in front of a high wall at a distance of 80m. He
clapped two boards together at such a rate that each clap coincided with the echo from the wall. A second observer noted
a time of 9.5 seconds starting with first clap and ending with the 21st clap.
i) Calculate the speed of sound under these conditions.
ii) Describe one probable source of error in this experiment.
iii) State one way in which sound wave differ from light waves.
Date posted: May 30, 2019. Answers (1)
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the measurement is...(Solved)
The speed of sound in air determined on a warm day is 330m/s. Explain any difference you would expect in the results if
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Date posted: May 30, 2019. Answers (1)
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Using the above information, determine the...(Solved)
The figure below is a sketch of ripples caused by a vibrator in a ripple tank whose frequency is 50Hz
Using the above information, determine the speed of the wave motion.
Date posted: May 30, 2019. Answers (1)
- A person standing behind a wall hears a bell ringing although he cannot see the bell. What property of sound enables him
to hear the sound?(Solved)
A person standing behind a wall hears a bell ringing although he cannot see the bell. What property of sound enables him
to hear the sound?
Date posted: May 30, 2019. Answers (1)