a. F = Ke
40 N = K x 0.01
4000 = K
4000 N/m = k
b. F = Ke
=4000 x 1.4/100
=56 N
joseph rimiru answered the question on October 1, 2017 at 05:32
- 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)
- Give a reason why mercury is a suitable liquid for use in a barometer.(Solved)
Give a reason why mercury is a suitable liquid for use in a barometer.
Date posted: September 29, 2017. Answers (1)
- A girl opened a strong perfume in class bought from the beauty shop. State the reason why the perfume was detected throughout the room.(Solved)
A girl opened a strong perfume in class bought from the beauty shop. State the reason why the perfume was detected throughout the room.
Date posted: September 29, 2017. Answers (1)
- Differentiate between floatation and sinking in terms Archimedes principle.(Solved)
Differentiate between floatation and sinking in terms Archimedes principle.
Date posted: September 28, 2017. Answers (1)
- State two conditions that must be met for a gas to obey pressure law.(Solved)
State two conditions that must be met for a gas to obey pressure law.
Date posted: September 28, 2017. Answers (1)
- State two properties which makes the oil suitable for use in machines(Solved)
State two properties which makes the oil suitable for use in machines
Date posted: September 28, 2017. Answers (1)
- Give a reason why ink is most likely to ooze out of a pen when one is up in a plane.(Solved)
Give a reason why ink is most likely to ooze out of a pen when one is up in a plane.
Date posted: September 28, 2017. Answers (1)
- Give a reason why a body moving in a circular path with constant speed is said to be
accelerating(Solved)
Give a reason why a body moving in a circular path with constant speed is said to be
accelerating
Date posted: September 28, 2017. Answers (1)
- Distinguish between velocity and speed.(Solved)
Distinguish between velocity and speed.
Date posted: September 28, 2017. Answers (1)
- State any two ways of minimizing heat gains to a substance placed in a vacuum flask.(Solved)
State any two ways of minimizing heat gains to a substance placed in a vacuum flask.
Date posted: September 28, 2017. Answers (1)