actm = ctm
x(0.3) + 2.0 x 0.1 = (30 x 0.2) + 2 x 0.1
0.3x = 6.2 – 2.0
x = 14N
sharon kalunda answered the question on April 3, 2019 at 15:24
- Figure shows a uniform wooden plank which weighs 10N. The plank is balanced at 0.8m from one end by a mass of 2.5kg.(Solved)
Figure shows a uniform wooden plank which weighs 10N. The plank is balanced at 0.8m from one end by a mass of 2.5kg.
What is the length of the wooden plank in metres?
Date posted: April 3, 2019. Answers (1)
- The fig. below shows a floating object of volume 40,000 cm3 and mass 10g. It is held as shown in water of density 1.25g/cm3 by...(Solved)
The fig. below shows a floating object of volume 40,000 cm3 and mass 10g. It is held as shown in water of density 1.25g/cm3 by a light cable at the bottom so that ¾ of the volume of the object is below the water surface. (Assume that up thrust due to air is negligible)
Calculate the volume of the object under water. *
Date posted: April 3, 2019. Answers (1)
- The figure below shows a system in equilibrium at room temperature. The system is taken outside where the temperature is 20oC higher for sometime.(Solved)
The figure below shows a system in equilibrium at room temperature. The system is taken outside where the temperature is 20oC higher for sometime.
Explain why it tips to the right when it is taken outside the room.
Date posted: April 3, 2019. Answers (1)
- The diagram below shows a uniform meter rule of mass 300g balanced by two forces F1 and F2.Force F2 is 5N. Assuming there is no...(Solved)
The diagram below shows a uniform meter rule of mass 300g balanced by two forces F1 and F2.Force F2 is 5N. Assuming there is no frictional force on the pulleys,
Calculate the force F1
Date posted: April 3, 2019. Answers (1)
- Figure below shows a uniform metre rule in equilibrium under the forces shown(Solved)
Figure below shows a uniform metre rule in equilibrium under the forces shown.
Determine the weight of the metre rule
Date posted: April 3, 2019. Answers (1)
- Draw a sketch of a micrometer screw gauge showing a reading of 8.53mm.(Solved)
Draw a sketch of a micrometer screw gauge showing a reading of 8.53mm.
Date posted: April 3, 2019. Answers (1)
- Give the reading on the micrometer screw gauge if it has a positive zero error of 0.01mm(Solved)
Give the reading on the micrometer screw gauge if it has a positive zero error of 0.01mm.
Date posted: April 3, 2019. Answers (1)
- Figure (a) Shows vernier calipers with the jaws completely closed while (b) shows the same vernier calipers in use to measure the diameter of a...(Solved)
Figure (a) Shows vernier calipers with the jaws completely closed while (b) shows the same vernier calipers in use to measure the diameter of a coin.
Determine the actual diameter of the coin
Date posted: April 3, 2019. Answers (1)
- When a drop of olive oil of radius 1.36mm is placed on the surface of water, it spreads out
to form a circular film of diameter...(Solved)
When a drop of olive oil of radius 1.36mm is placed on the surface of water, it spreads out
to form a circular film of diameter 40cm. Calculate;
(a) The volume of the olive oil drop in m3 (Take pi = 22/7)
(b) Using the value of (a) above, estimate the thickness of the film.
Date posted: April 3, 2019. Answers (1)
- Three identical springs A, B and C of negligible weight are arranged as shown below;(Solved)
Three identical springs A, B and C of negligible weight are arranged as shown below;
If C stretches by 3cm, and bar XY is assumed to be weightless, determine the extension in A
Date posted: April 3, 2019. Answers (1)
- Figure shows marble of mass 2.0g placed between the jaws of Vernier calipers. The magnified section is also shown. The reading of the gauge when...(Solved)
Figure shows marble of mass 2.0g placed between the jaws of Vernier calipers. The magnified section is also shown. The reading of the gauge when the jaws were fully closed without the marble was 0.01cm. Use this information and the figure to answer questions a and b.
a)What is the diameter of the marble?
b)Determine the density of the marble give your answer to three significant figure (assume that the
marble is spherical)
Date posted: April 3, 2019. Answers (1)
- Figure below shows an object of volume 300cm3 placed on the pan of a beam balance.The pointer was initially at the zero mark.(Solved)
Figure below shows an object of volume 300cm3 placed on the pan of a beam balance.The pointer was initially at the zero mark.
Determine the density of the object in Kgm-3
Date posted: April 3, 2019. Answers (1)
- A micrometer screw gauge with zero error of -0.01mm is used to determine the diameter of a marble whose diameter is 2.32mm.
(Solved)
A micrometer screw gauge with zero error of -0.01mm is used to determine the diameter of a marble whose diameter is 2.32mm.
(i) State the reading taken when the cylinder is grasped by the jaws
(ii) In the space below, sketch the scale that gives the reading in (a) above if it has a pitch
Date posted: April 3, 2019. Answers (1)
- A micrometer screw gauge has a negative zero error of 0.06mm. Show on a micrometer screw gauge, including the essential parts only a reading of...(Solved)
A micrometer screw gauge has a negative zero error of 0.06mm. Show on a micrometer screw gauge, including the essential parts only a reading of 5.99mm
Date posted: April 3, 2019. Answers (1)
- The vernier calipers shown below have a zero error of -0.06 cm(Solved)
The vernier calipers shown below have a zero error of -0.06 cm
State the actual reading on the instrument.
Date posted: April 3, 2019. Answers (1)
- a) The data below was obtained in an experiment to estimate the diameter of an oil molecule:-(Solved)
(a)The data below was obtained in an experiment to estimate the diameter of an oil molecule:-
- Level of oil in burette= 26cm3
- Level of oil in burettes after adding 50drops of oil=25.2cm3
- Diameter of oil patch= 7cm
(i) Determine the volume of one drop of oil
(ii) Calculate the thickness of a molecule
(iii) State any two assumptions made in this experiment
(iv) In the experiment 14.(a) lycopodium powder is used on the water surface. What is the role
of the lycopodium powder?
(b) A molecule of a liquid occupies a space about 1.5 x 10-9-9m in
thickness and breadth. Calculate the number of molecules in a litre of the liquid
Date posted: April 3, 2019. Answers (1)
- Lycopodium powder is lightly sprinkled on a clean water surface in a large tray. A red hot needle is plunged at the centre of the...(Solved)
Lycopodium powder is lightly sprinkled on a clean water surface in a large tray. A red hot needle is plunged at the centre of the water surface. State and explain the observation
Date posted: April 3, 2019. Answers (1)
- Water in a dam falls through a height 24.5m. If we assume that there are no energy losses,calculate the new temperature of the water as...(Solved)
Water in a dam falls through a height 24.5m. If we assume that there are no energy losses,calculate the new temperature of the water as it strikes the lower end, given that its initial temperature at the top of the dam is 18.9°C.Take specific heat capacity of water = 4200J/kg
Date posted: April 3, 2019. Answers (1)
- The springs A, B, C and D are identical and each extends by 2cm, when a force of 6N is suspended on the system. Determine...(Solved)
The springs A, B, C and D are identical and each extends by 2cm, when a force of 6N is suspended on the system. Determine the extension of the system
Date posted: April 3, 2019. Answers (1)
- The figure below represents a bimetallic strip of metals X and Y at room temperature.(Solved)
The figure below represents a bimetallic strip of metals X and Y at room temperature.
The figure below shows its shape when dipped into crushed ice
Sketch a diagram in the space given below to show the shape when the strip is heated to a
temperature above the room temperature
Date posted: April 3, 2019. Answers (1)