For displacement method to work best, the solid whose volume is to be determined should:
(a) not be soluble in the liquid being used,
(b) not react with the liquid,
(c) sink in the liquid and,
(d) not absorb the liquid.
Wilfykil answered the question on April 15, 2019 at 05:29
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Find the volume of a sphere whose radius is 3.0cm
(Solved)
Find the volume of a sphere whose radius is 3.0cm
Date posted:
April 15, 2019
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Answers (1)
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In an experiment to estimate the height of a tree in Nyabururu Girls’ Secondary School compound, Grace recorded the following data.
(Solved)
In an experiment to estimate the height of a tree in Nyabururu Girls’ Secondary School compound, Grace recorded the following data.
I. Length of shadow of the tree= 1000cm
II. Length of shadow of the rod = 200cm
III. Height of the rod = 100cm
Determine the height of the tree
Date posted:
April 15, 2019
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Answers (1)
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Give the sources of Error When Using a Meter Rule
(Solved)
Give the sources of Error When Using a Meter Rule
Date posted:
April 15, 2019
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Answers (1)
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Which factors are Considered When Choosing an Instrument for Measuring Lengths?
(Solved)
Which factors are Considered When Choosing an Instrument for Measuring Lengths?
Date posted:
April 15, 2019
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Answers (1)
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Give reasons for Establishing SI Units?
(Solved)
Give reasons for Establishing SI Units?
Date posted:
April 13, 2019
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Answers (1)
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Show the relationship between Physics, Other Subjects and Technology
(Solved)
Show the relationship between Physics, Other Subjects and Technology
Date posted:
April 13, 2019
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Answers (1)
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An object is placed 30cm from a concave mirror of focal length 20cm. Calculate;
a. Image position
b. Magnification
(Solved)
An object is placed 30cm from a concave mirror of focal length 20cm. Calculate;
a. Image position
b. Magnification
Date posted:
April 11, 2019
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Answers (1)
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The diagram below shows the magnetic field pattern between two magnets, P and Q
(Solved)
The diagram below shows the magnetic field pattern between two magnets, P and Q
State which of the two magnets P and Q is stronger. Explain
Date posted:
April 11, 2019
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Answers (1)
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A ball is projected vertically upwards with an initial velocity of 20 m/s. Determine
a. its maximum height
b. the time taken to return to its starting...
(Solved)
A ball is projected vertically upwards with an initial velocity of 20 m/s. Determine
a. its maximum height
b. the time taken to return to its starting point.
Date posted:
April 10, 2019
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Answers (1)
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The figure below shows a 10- tick strip ticker tape chart of for the motion of a trolley. The ticker
tape timer was connected to a...
(Solved)
The figure below shows a 10- tick strip ticker tape chart of for the motion of a trolley. The ticker
tape timer was connected to a 50 Hz power supply. Which of the following statements is
true about the motion of the trolley?
Calculate the
a. total distance travelled
b. average velocity
c. acceleration of the trolley
Date posted:
April 10, 2019
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Answers (1)
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The figure below shows a ticker-tape for trolley used in an experiment.
(Solved)
The figure below shows a ticker-tape for trolley used in an experiment.
If the frequency of the ticker timer was 50Hz, calculate,
a. Initial velocity
b. Final velocity
c. Acceleration of the trolley
Date posted:
April 10, 2019
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Answers (1)
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A swimer takes off straight up from a diving board 1.80 m above water surface in a pool and
falls into the swimming pool. If her...
(Solved)
A swimer takes off straight up from a diving board 1.80 m above water surface in a pool and
falls into the swimming pool. If her initial velocity is 5 m/s , determine
a. The highest point above the board
b. Her velocity as she hits the water
c. The time she takes to hit the surface of water
Date posted:
April 10, 2019
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Answers (1)
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Using a ticker-timer that vibrates at a frequency of 50 Hz, a student carried out an experiment
to study the motion of a trolley.The figure below...
(Solved)
Using a ticker-timer that vibrates at a frequency of 50 Hz, a student carried out an experiment
to study the motion of a trolley.The figure below shows a tape chart consisting of 10-tick strips that
he obtained.
Calculate the
a. total distance travelled
b. average velocity
c. acceleration of the trolley
Date posted:
April 10, 2019
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Answers (1)
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The figure below shows ticker tape chart for a trolley pushed up a slope. Every section of the tape
contains 5 spaces. If the ticker-tape timer...
(Solved)
The figure below shows ticker tape chart for a trolley pushed up a slope. Every section of the tape
contains 5 spaces. If the ticker-tape timer has a frequency of 50 Hz, determine the
acceleration of the trolley.
Date posted:
April 10, 2019
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Answers (1)
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The figure below shows a ticker-tape for trolley moving over an inclined plane, a frequency
of 50Hz.
(Solved)
The figure below shows a ticker-tape for trolley moving over an inclined plane, a frequency
of 50Hz.
Calculate,
a. Initial velocity
b. Final velocity
c. Acceleration of the trolley
Date posted:
April 10, 2019
.
Answers (1)
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The ticker-tape in Figure below was produced by a toy car moving over an inclined plane.
If the ticker-tape timer produced 100 dots per second, find...
(Solved)
The ticker-tape in Figure below was produced by a toy car moving over an inclined plane.
If the ticker-tape timer produced 100 dots per second, find the
a. Initial velocity at A
b. Final velocity at B
c. Acceleration of the toy car.
Date posted:
April 10, 2019
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Answers (1)
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A radioactive element decays to 1/128 of its original activity after 49 days. Determine its
half –life
(Solved)
A radioactive element decays to 1/128 of its original activity after 49 days. Determine its
half –life
Date posted:
April 5, 2019
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Answers (1)
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The figure shows the circuit of a modern X-ray tube
(Solved)
The figure shows the circuit of a modern X-ray tube
Name the part labeled C and state its function
Date posted:
April 5, 2019
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Answers (1)
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An x-ray tube is operating with an anode potential of 12Kv and a current of 10.0m.A:
(Solved)
An x-ray tube is operating with an anode potential of 12Kv and a current of 10.0m.A:
(i) Calculate the number of electrons hitting the anode per second
(ii) Determine the velocity with which the electrons strike the target
Date posted:
April 5, 2019
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Answers (1)
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Three identical bulbs are connected in series with a battery of dry cells. At first the bulbs
shine brightly but gradually become dimmer. Using the same...
(Solved)
Three identical bulbs are connected in series with a battery of dry cells. At first the bulbs
shine brightly but gradually become dimmer. Using the same cells, explain how you
would increase the brilliance of the bulbs
Date posted:
April 5, 2019
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Answers (1)