Get premium membership and access questions with answers, video lessons as well as revision papers.
When the negatively charged rod is brought near the sphere, positive charges are attracted to the rod while negative charges repelled. When earthing is done, negative charges are conducted to the earth leaving only positive charges in the sphere. When the rod is removed, the positive charges in the sphere repel against themselves and distribute evenly in the sphere.
chrispohmomanyi answered the question on September 18, 2017 at 14:22
- Distinguish between mass and weight of a body stating the S.I units for each(Solved)
Distinguish between mass and weight of a body stating the S.I units for each.
Date posted: September 18, 2017. Answers (1)
- Define electric current and state its SI unit(Solved)
Define electric current and state its SI unit
Date posted: September 18, 2017. Answers (1)
- State two factors which affect pressure in liquids(Solved)
State two factors which affect pressure in liquids
Date posted: September 18, 2017. Answers (1)
- Name 3 types of forces that act without contact(Solved)
Name 3 types of forces that act without contact
Date posted: September 18, 2017. Answers (1)
- State three precautions that must be taken when using the density bottle(Solved)
State three precautions that must be taken when using the density bottle
Date posted: September 18, 2017. Answers (1)
- State why most braking systems use liquids and not gases.(Solved)
State why most braking systems use liquids and not gases.
Date posted: September 18, 2017. Answers (1)
- One property of a liquid that is considered while constructing a liquid – in – glass thermometer isthat the liquid expands more than the glass...(Solved)
One property of a liquid that is considered while constructing a liquid – in – glass thermometer is
that the liquid expands more than the glass for the same temperature change. State any other two
properties of the liquids that are considered
Date posted: September 18, 2017. Answers (1)
- State the assumption made when calculating the size of a molecule in the thin oil film experiment(Solved)
State the assumption made when calculating the size of a molecule in the thin oil film experiment
Date posted: September 18, 2017. Answers (1)
- Show that the force driving the liquid through the U – tube is proportional to the height, h(Solved)
Show that the force driving the liquid through the U – tube is proportional to the height, h
Date posted: September 18, 2017. Answers (1)
- Suppose the handle bars of a wheelbarrow are extended, which force(s) would change and how(Solved)
Suppose the handle bars of a wheelbarrow are extended, which force(s) would change and how
Date posted: September 18, 2017. Answers (1)
- Define centripetal acceleration(Solved)
Define centripetal acceleration
Date posted: September 18, 2017. Answers (1)
- A measuring cylinder contains 20cm3 of water. 10cm3 of salt is added and stirred. Explain why the volume is not 30cm^3.(Solved)
A measuring cylinder contains 20cm3 of water. 10cm3 of salt is added and stirred. Explain why the volume is not 30cm3.
Date posted: September 18, 2017. Answers (1)
- A pipe of radius 0.4cm is connected to another pipe of radius 0.6cm. If water flows in the wider pipeat a speed of 5ms-1. What...(Solved)
A pipe of radius 0.4cm is connected to another pipe of radius 0.6cm. If water flows in the wider pipe
at a speed of 5ms-1. What is the speed in the narrower pipe
Date posted: September 18, 2017. Answers (1)
- Explain why a car feels lighter as it travels at a higher velocity.(Solved)
Explain why a car feels lighter as it travels at a higher velocity.
Date posted: September 18, 2017. Answers (1)
- Water wets clean surfaces of glass but not waxed ones. Explain(Solved)
Water wets clean surfaces of glass but not waxed ones. Explain
Date posted: September 18, 2017. Answers (1)
- Name all the forces acting on the mass suspended from a spring balance(Solved)
Name all the forces acting on the mass suspended from a spring balance
Date posted: September 18, 2017. Answers (1)
- State any three effects of force(Solved)
State any three effects of force.
Date posted: September 18, 2017. Answers (1)
- Explain why aquatic animals are able to survive under water when the surface is already frozen.(Solved)
Explain why aquatic animals are able to survive under water when the surface is already frozen.
Date posted: September 16, 2017. Answers (1)
- Define the following terms as applied to curved mirrors. (a) Principal axis. (b) Centre of curvature(c) Principal focus(Solved)
Define the following terms as applied to curved mirrors.
a) Principal axis.
b) Centre of curvature.
c) Principal focus.
Date posted: September 16, 2017. Answers (1)
- Differentiate between the images formed by a convex mirror and a pinhole camera(Solved)
Differentiate between the images formed by a convex mirror and a pinhole camera
Date posted: September 16, 2017. Answers (1)