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The correct answer is D. move the pivot towards Mary.
The distance from John to pivot should be greater than the distance from the pivot to Mary, since John is lighter than Mary.
sharon kalunda answered the question on July 29, 2019 at 13:14
- Which one of the following is an advantage of hard water? (Solved)
Which one of the following is an advantage of hard water?
A. Saves soap during washing.
B. Lathers easily with soap.
C. Forms scum with soap.
D. Suitable for drinking.
Date posted: July 29, 2019. Answers (1)
- In which one of the following activities is water used in industries?(Solved)
In which one of the following activities is water used in industries?
A. Cleaning tools and equipment.
B. Preparation of soft drinks.
C. Washing cars.
D. Watering plants.
Date posted: July 29, 2019. Answers (1)
- The diagram below represents a beak of a certain bird.
The bird represented is(Solved)
The diagram below represents a beak of a certain bird.
The bird represented is
A. filter feeder
B. grain eater
C. nectar feeder
D. fish eater.
Date posted: July 29, 2019. Answers (1)
- Which one of the following is a characteristic of amphibians? (Solved)
Which one of the following is a characteristic of amphibians?
A. Lay their eggs on land.
B. Live partly in water.
C. Have moist skin with scales.
D. Adults breathe through gills.
Date posted: July 29, 2019. Answers (1)
- Which one of the following groups consists only of field pests?(Solved)
Which one of the following groups consists only of field pests?
A. Weavils, aphids and weaver birds.
B. Aphids, weaver birds and white ants
C. Weavils, white ants and stalkborer.
D. Aphids, weaver birds and stalkborer.
Date posted: July 29, 2019. Answers (1)
- The following are some adaptations of plants that grow in wet environment except having (Solved)
The following are some adaptations of plants that grow in wet environment except having
A. Large flat leaves
B. Leaves with waxy upper surface
C. Thick leaf cuticle
D. An increased number of stomata.
Date posted: July 29, 2019. Answers (1)
- In order to make a certain weather instrument, a pupil assembled the following materials: Glass battle, ink, biro pen lube, nails, manilla paper and water....(Solved)
In order to make a certain weather instrument, a pupil assembled the following materials: Glass battle, ink, biro pen lube, nails, manilla paper and water. Which one of the following instrument was the pupil likely to make?
A. Wind vane.
B. Liquid thermometer.
C. Rain gauge.
D. Windsock.
Date posted: July 29, 2019. Answers (1)
- Which one of the following pairs consists of planets with the longest orbits? (Solved)
Which one of the following pairs consists of planets with the longest orbits?
A. Mars and Mercury.
B. Venus and Jupiter.
C. Earth and Saturn.
D. Neptune and Uranus.
Date posted: July 29, 2019. Answers (1)
- The following are sexually transmitted infections except (Solved)
The following are sexually transmitted infections except
A. syphilis
B. gonorrhoea
C. bilharzia
D. chancroid.
Date posted: July 29, 2019. Answers (1)
- A certain person looked healthy and strong but tested positive for HIV/AIDS. In which one of the following stages of HIV/AIDS was the person likely...(Solved)
A certain person looked healthy and strong but tested positive for HIV/AIDS. In which one of the following stages of HIV/AIDS was the person likely to be?
A. Window.
B. Incubation.
C. Symptomatic.
D. Full blown.
Date posted: July 29, 2019. Answers (1)
- The diagram below represents a certain type of human tooth.
The function of the tooth is(Solved)
The diagram below represents a certain type of human tooth.
The function of the tooth is
A. gripping and tearing
B. tearing and grinding
C. crushing and grinding
D. biting and crushing.
Date posted: July 29, 2019. Answers (1)
- In the human body digested food is absorbed in the(Solved)
In the human body digested food is absorbed in the
A. Stomach
B. Large intestines
C. Rectum
D. Small intestines.
Date posted: July 29, 2019. Answers (1)
- Which one of the following materials will not form a shadow when light is shone on it? (Solved)
Which one of the following materials will not form a shadow when light is shone on it?
A. White paper.
B. Mirror.
C. Glass of a lamp.
D. Sheet of aluminium.
Date posted: July 29, 2019. Answers (1)
- Which one of the following pairs of materials is suitable for demonstrating the formation of a rainbow when using the sun as a source of...(Solved)
Which one of the following pairs of materials is suitable for demonstrating the formation of a rainbow when using the sun as a source of light?
A. Ruler and mirror.
B. Mirror and water.
C. Mirror and white screen.
D. Glass container and minor.
Date posted: July 29, 2019. Answers (1)
- The following statements are true about energy except (Solved)
The following statements are true about energy except
A. It causes motion
B. It can be conserved
C. It changes from one form to another
D. Is the ability to do work.
Date posted: July 29, 2019. Answers (1)
- The diagram below shows a set-qr used to demonstrate a certain aspect of matter.
Which one of the following is likely to occur after some...(Solved)
The diagram below shows a set-qr used to demonstrate a certain aspect of matter.
Which one of the following is likely to occur after some time?
A. Air gets into the balloon.
B. Heat enters the balloon.
C. Water enters into the bottle.
D. Balloon contracts.
Date posted: July 29, 2019. Answers (1)
- Which one of the following practices is the most effective in prevention of food poisoning from packed foods? (Solved)
Which one of the following practices is the most effective in prevention of food poisoning from packed foods?
A. Washing hands before handling it.
B. Checking the expiry date.
C. Proper storage.
D. Proper cooking.
Date posted: July 29, 2019. Answers (1)
- Which one of the following statements is true about splash erosion?(Solved)
Which one of the following statements is true about splash erosion?
A. Forms shallow trenches.
B. Caused by wind and water.
C. Removes a thin layer of soil.
D. Occurs below roofs of buildings.
Date posted: July 29, 2019. Answers (1)
- To model the solar system, the following materials can be used:
(i) soft board
(ii) clay
(iii) pins
(iv) glue
(v) manila paper.
Which one...(Solved)
To model the solar system, the following materials can be used:
(i) soft board
(ii) clay
(iii) pins
(iv) glue
(v) manila paper.
Which one of the following materials would be most suitable to use instead of the pins?
A. Wax.
B. Plasticine.
C. Pieces of barbed wire.
D. Pieces of cello tape.
Date posted: July 29, 2019. Answers (1)
- Which one of the following is an effect of air pollution on non-living things?(Solved)
Which one of the following is an effect of air pollution on non-living things?
A. Impairs visibility.
B. Damages iron sheets.
C. Causes wilting.
D. Interferes with photosynthesis.
Date posted: July 29, 2019. Answers (1)