-Balance the metre rule on the wooden wedge.
-Put the 50grams mass on the 40th centimetre mark from the centre.
-Balance the 100grams mass by sliding it slowly from the centre outwards on the other side of the metre rule.
-After it has balanced, calculate moments of a force for each side.
-The metre rule will be at equilibrium only when the moments of a force are equal.
briandibadest answered the question on December 11, 2020 at 09:19
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Discuss the electromotive force
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The questions asks one to explain the electromotive force in electricity.
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June 5, 2020
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April 3, 2020
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Light of frequency 6.5x1014Hz is radiated on a metal whose threshold frequency is 2.0 x1014 Hz.Determine the kinetic energy of the emitted electrons.
(Planck’s constant...
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Light of frequency 6.5x1014Hz is radiated on a metal whose threshold frequency is 2.0 x1014 Hz.Determine the kinetic energy of the emitted electrons.
(Planck’s constant =6.63x10-34 Js. )
Date posted:
November 22, 2019
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In Figure below, complete the diagrams to show the path of the X-ray beam when it enters an electric field.
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In Figure below, complete the diagrams to show the path of the X-ray beam when it enters an electric field.
Date posted:
November 22, 2019
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The figure below shows a current carrying conductor placed between two strong magnets.
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Indicate the direction of the magnetic field and the force on the conductor
Date posted:
November 22, 2019
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Name the radiation represented by letter Q and state one use of the radiation.
Date posted:
November 22, 2019
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Answers (1)
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Calculate the magnification produced by a convex lens of focal length 10cm used in a simple microscope given that the image distance is 40cm.
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Calculate the magnification produced by a convex lens of focal length 10cm used in a simple microscope given that the image distance is 40cm.
Date posted:
November 22, 2019
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Answers (1)
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The figure shows objects A and B placed in front of a mirror M.
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The figure shows objects A and B placed in front of a mirror M.
Show the position of their images A1 and B1.
Date posted:
November 22, 2019
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Answers (1)
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The graph shows the relationship between the pressure and temperature for a fixed mass of an ideal gas at constant volume.
(Solved)
The graph shows the relationship between the pressure and temperature for a fixed mass of an ideal gas at constant volume.
i) Given that the relationship between pressure, P and temperature, T in Kelvin is of the form P = kT + C where k and C are constants. Determine from the graph,
I. Value of k
II. Value of C
Date posted:
November 22, 2019
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Answers (1)
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The figure below shows a pulley system being used to raise a load.
(Solved)
The figure below shows a pulley system being used to raise a load.
This pulley system has an efficiency of 75%.
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(ii) Determine the mechanical advantage of the pulley system.
(iii) Determine the effort required to raise a load of 240kg.
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Date posted:
November 22, 2019
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Date posted:
November 22, 2019
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Three identical springs each of weight 1.5N are arranged to support a 50N load as shown in the figure below:
(Solved)
Three identical springs each of weight 1.5N are arranged to support a 50N load as shown in the figure below:
a) Given that one such a spring extends by 2 cm when a load of 20N hangs on its lower end, determine its spring constant.
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Date posted:
November 22, 2019
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Answers (1)
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The figure below shows two corks X and Y fixed on a polished plate and a dark plate with candle wax.
(Solved)
The figure below shows two corks X and Y fixed on a polished plate and a dark plate with candle wax.
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Date posted:
November 22, 2019
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The figure below shows a micrometer screw gauge holding a ball bearing. Use the figure to answer questions (i) and (ii)
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ii) Determine the radius of the ball bearing in S.I. units.
Date posted:
November 22, 2019
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Answers (1)
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Figure 1 shows a wire wound closely on a test tube. Given that L = 12 mm, determine the thickness of the wire.
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Figure 1 shows a wire wound closely on a test tube. Given that L = 12 mm, determine the thickness of the wire.
Date posted:
November 22, 2019
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Answers (1)
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A bullet of mass 20 g moving at 400 m/s strikes a block of wood of mass 3.5kg initially at rest. The bullet sticks into...
(Solved)
A bullet of mass 20 g moving at 400 m/s strikes a block of wood of mass 3.5kg initially at rest. The bullet sticks into the block and the two move off together on a horizontal surface, where a frictional retarding force of 4N is acting between the block and surface.
(i) Determine the initial common velocity of bullet and wooden block.
(ii) What distance does the block move before coming to rest?
Date posted:
November 13, 2019
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Answers (1)
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The figure below shows a body of mass;??=200?? attached to the centre of a rotating table with a string. The radius of the string was...
(Solved)
The figure below shows a body of mass;𝑚=200𝑔 attached to the centre of a rotating table with a string. The radius of the string was varied and different values of angular velocity recorded. The mass of the body remained constant throughout the experiment
The results obtained for angular velocity and radius were used to plot the following graph;
From the above graph;
(i) Calculate the value of the slope
(iii)State the significance of P.
Date posted:
November 13, 2019
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Answers (1)
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An object weighs 1.04N in air, 0.64N when fully immersed in water and 0.72N when fully immersed in a liquid. If the density of water...
(Solved)
An object weighs 1.04N in air, 0.64N when fully immersed in water and 0.72N when fully immersed in a liquid. If the density of water is 1000 kgm-3, find the density of the liquid.
Date posted:
November 13, 2019
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Answers (1)
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The figure below shows a Bunsen burner.
(Solved)
The figure below shows a Bunsen burner.
Use the Bernoulli’s Principle to explain how air is drawn into the burner when the gas tap opened.
Date posted:
November 13, 2019
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Answers (1)
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A car is brought to rest from a speed of 30m/s in 2 seconds. If the driver’s reaction time is 0.3s, determine the shortest stopping...
(Solved)
A car is brought to rest from a speed of 30m/s in 2 seconds. If the driver’s reaction time is 0.3s, determine the shortest stopping distance.
Date posted:
November 13, 2019
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Answers (1)