Get premium membership and access questions with answers, video lessons as well as revision papers.
Differences between Gravitational and Coulomb forces
i. First, a comparison of the proportionality constants - k versus G - reveals that the
Coulomb's law constant (k) is significantly greater than Newton's universal gravitation
constant (G). Subsequently a unit of charge will attract a unit of charge with
significantly more force than a unit of mass will attract a unit of mass.
ii. Second, gravitational forces are only attractive; electrical forces can be either attractive or
repulsive.
Anganifelix answered the question on June 14, 2018 at 17:27
- What are the Similarities between of the gravitational and Coulomb forces(Solved)
What are the Similarities between of the gravitational and Coulomb forces
Date posted: June 14, 2018. Answers (1)
- Discuss the disadvantages of friction(Solved)
Discuss the disadvantages of friction.
Date posted: June 8, 2018. Answers (1)
- A car of mass 1200kg moving at 90km/h is brought to rest over a distance of 20m. Calculate the breaking force.(Solved)
A car of mass 1200kg moving at 90km/h is brought to rest over a distance of 20m. Calculate the breaking force.
Date posted: June 5, 2018. Answers (1)
- For a body moving with a constant acceleration, a,show that v=u+at where v and u are the final and initial velocities respectively while t is...(Solved)
For a body moving with a constant acceleration, a,show that v=u+at where v and u are the final and initial velocities respectively while t is the time taken
Date posted: June 5, 2018. Answers (1)
- Distinguish between density and relative density(Solved)
Distinguish between density and relative density.
Date posted: May 25, 2018. Answers (1)
- State two advantages of a thermocouple over a mercury in glass thermometer (Solved)
State two advantages of a thermocouple over a mercury in glass thermometer
Date posted: May 23, 2018. Answers (1)
- Give a reason why water wets glass while mercury does not
(Solved)
Give a reason why water wets glass while mercury does not
Date posted: May 19, 2018. Answers (1)
- Describe how to fit an iron tyre in a wheel of a train(Solved)
Describe how to fit an iron tyre in a wheel of a train.
Date posted: May 10, 2018. Answers (1)
- Describe how you can measure the diameter of a tennis ball(Solved)
Describe how you can measure the diameter of a tennis ball.
Date posted: May 10, 2018. Answers (1)
- Briefly describe an experiment to show how the image is formed in a pinhole camera(Solved)
Briefly describe an experiment to show how the image is formed in a pinhole camera
Date posted: May 7, 2018. Answers (1)
- List applications of expansion in gases(Solved)
List applications of expansion in gases.
Date posted: April 28, 2018. Answers (1)
- Explain how a solar water purifier works(Solved)
Explain how a solar water purifier works.
Date posted: April 28, 2018. Answers (1)
- You are provided with a strong bar, a ruler and 10 kg weight. How would you use them to weight a sack of potatoes?(Solved)
You are provided with a strong bar, a ruler and 10 kg weight. How would you use them to weight a sack of potatoes?
Date posted: April 27, 2018. Answers (1)
- A girl is shouting in front of the cliff from far away. She hears the echo 0.5 sec later. What is the velocity of sound in air(Solved)
A girl is shouting in front of the cliff from far away. She hears the echo 0.5 sec later. What is the velocity of sound in air.
Date posted: April 26, 2018. Answers (1)
- A stop watch started 0.50 sec after the start button was pressed. The time recorded using the stopwatch for a ball bearing failing through a...(Solved)
A stop watch started 0.50 sec after the start button was pressed. The time recorded using the stopwatch for a ball bearing failing through a liquid was 2.53 sec. Determine the time of fail?
Date posted: April 26, 2018. Answers (1)
- 50 drops of oil have a volume of 1.0 cubic cm. If a drop of oil forms an oil patch of diameter 20cm, determine...(Solved)
50 drops of oil have a volume of 1.0 cubic cm. If a drop of oil forms an oil patch of diameter 20cm, determine the size of the oil molecule.
Date posted: April 25, 2018. Answers (1)
- The water level in a burette is 27 cm³. If 88 drops of the bottle and the average volume of drop is 0.25cm³.What is the...(Solved)
The water level in a burette is 27 cm³. If 88 drops of the bottle and the average volume of drop is 0.25cm³.What is the final water level in the burette?
Date posted: April 25, 2018. Answers (1)
- Describe an experiment to find the density of a solid using a density bottle(Solved)
Describe an experiment to find the density of a solid using a density bottle
Date posted: April 25, 2018. Answers (1)
- State two ways of increasing pressure in solids(Solved)
State two ways of increasing pressure in solids.
Date posted: April 25, 2018. Answers (1)
- Explain why ventilations are put near the roof but not near the floor (Solved)
Explain why ventilations are put near the roof but not near the floor
Date posted: April 24, 2018. Answers (1)