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On a hot day, the lines expand increasing the length hence sagging. While on a cold day , the lines contract and reduce in length making them tight.
chrispohmomanyi answered the question on October 1, 2017 at 07:32
- Explain why farm tractors have wide rear tyres. (Solved)
Explain why farm tractors have wide rear tyres.
Date posted: October 1, 2017. Answers (1)
- Explain how radiations may be used to ensure that containers are filled up with equal amount of content.(Solved)
Explain how radiations may be used to ensure that containers are filled up with equal amount of content.
Date posted: October 1, 2017. Answers (1)
- State two properties that distinguish cathode rays from x-rays.(Solved)
State two properties that distinguish cathode rays from x-rays.
Date posted: October 1, 2017. Answers (1)
- State a substance whose relative density is 1.(Solved)
State a substance whose relative density is 1.
Date posted: October 1, 2017. Answers (1)
- Define relative density.(Solved)
Define relative density.
Date posted: October 1, 2017. Answers (1)
- State any difference between dry cells and an accumulator.(Solved)
State any difference between dry cells and an accumulator.
Date posted: October 1, 2017. Answers (1)
- An automobile electrician notices that by replacing a wire, it becomes hot and its insulation burns off. Explain the most probable mistake she made.(Solved)
An automobile electrician notices that by replacing a wire, it becomes hot and its insulation burns off. Explain the most probable mistake she made.
Date posted: October 1, 2017. Answers (1)
- A student is provided with a bar magnet and a string. Explain the easiest way of identifying the poles.(Solved)
A student is provided with a bar magnet and a string. Explain the easiest way of identifying the poles.
Date posted: October 1, 2017. Answers (1)
- An extension of 1.0 cm was caused on a spring by an object of weight 40 N.
a. What is the spring constant of the spring
b. What is...(Solved)
An extension of 1.0 cm was caused on a spring by an object of weight 40 N.
a. What is the spring constant of the spring
b. What is the weight of an object that would cause an extension of 1.4 cm at the end of the same spring.
Date posted: October 1, 2017. Answers (1)
- A man fixed a large concave mirror of focal length 2 m, 160 cm from his face. State three characteristics of his image in the mirror.(Solved)
A man fixed a large concave mirror of focal length 2 m, 160 cm from his face. State three characteristics of his image in the mirror.
Date posted: October 1, 2017. Answers (1)
- A student wishes to measure the thickness of a photocopying paper. What apparatus must he use?(Solved)
A student wishes to measure the thickness of a photocopying paper. What apparatus must he use?
Date posted: October 1, 2017. Answers (1)
- Hammering of a magnet demagnetizes a magnet. Explain how this takes place. (Solved)
Hammering of a magnet demagnetizes a magnet. Explain how this takes place.
Date posted: October 1, 2017. Answers (1)
- Determine the quantity of charge that crosses a point in 8 minutes if the current is 1.0 A(Solved)
Determine the quantity of charge that crosses a point in 8 minutes if the current is 1.0 A
Date posted: October 1, 2017. Answers (1)
- A charged electroscope is used in electrostatics study. State two of its uses.(Solved)
A charged electroscope is used in electrostatics study. State two of its uses.
Date posted: October 1, 2017. Answers (1)
- What does the following statement represent? ‘like charges repel while unlike charge attract’.(Solved)
What does the following statement represent? ‘like charges repel while unlike charge attract’.
Date posted: October 1, 2017. Answers (1)
- A convex mirror has a wide field of view than the plane mirror. Where is this property applied?(Solved)
A convex mirror has a wide field of view than the plane mirror. Where is this property applied?
Date posted: October 1, 2017. Answers (1)
- State the kind of image formed in a pinhole camera when the pinhole is enlarged(Solved)
State the kind of image formed in a pinhole camera when the pinhole is enlarged.
Date posted: October 1, 2017. Answers (1)
- A barber places two mirrors in parallel. State the number of images formed if a client sat between them.(Solved)
A barber places two mirrors in parallel. State the number of images formed if a client sat between them.
Date posted: October 1, 2017. Answers (1)
- An image is always formed upside down in a pin hole camera. State the reason.(Solved)
An image is always formed upside down in a pin hole camera. State the reason.
Date posted: September 29, 2017. Answers (1)
- Convert the following temperature values recorded in certain experiment to kelvin (K)
Temperature °C -263 -233 -203 -173 -143 -113 -83 -53
Temperature K
(Solved)
Convert the following temperature values recorded in certain experiment to kelvin (K)
Temperature ⁰C -263 -233 -203 -173 -143 -113 -83 -53
Temperature K
Date posted: September 29, 2017. Answers (1)