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So that the cool dense air can flow down to displace the warmer less dense air.
chrispohmomanyi answered the question on November 2, 2017 at 12:37
- Give a reason why liquids generally expand more than solids. (Solved)
Give a reason why liquids generally expand more than solids.
Date posted: November 2, 2017. Answers (1)
- In deriving the equation of continuity, what three assumptions are made?(Solved)
In deriving the equation of continuity, what three assumptions are made?
Date posted: November 2, 2017. Answers (1)
- Give a reason why most braking systems use liquids and not gases.(Solved)
Give a reason why most braking systems use liquids and not gases.
Date posted: November 2, 2017. Answers (1)
- A partially inflated balloon at sea level becomes fully inflated at higher altitudes. Explain this observation.(Solved)
A partially inflated balloon at sea level becomes fully inflated at higher altitudes. Explain this observation.
Date posted: November 2, 2017. Answers (1)
- Explain how a gas of constant volume exerts pressure on the walls of the container when temperature is increased.(Solved)
Explain how a gas of constant volume exerts pressure on the walls of the container when temperature is increased.
Date posted: November 2, 2017. Answers (1)
- Name the force that is responsible for the spread of water on a glass surface.(Solved)
Name the force that is responsible for the spread of water on a glass surface.
Date posted: November 2, 2017. Answers (1)
- A force can be a pull or push on the body. Name one type of force which is a pull only.(Solved)
A force can be a pull or push on the body. Name one type of force which is a pull only.
Date posted: November 2, 2017. Answers (1)
- Explain why a high jumper flexes his knees when landing on the ground.(Solved)
Explain why a high jumper flexes his knees when landing on the ground.
Date posted: November 2, 2017. Answers (1)
- Four cells have an e.m.f. of 1.5v each. What is the total e.m.f. when the cells are in parallel and which in series.(Solved)
Four cells have an e.m.f. of 1.5v each. What is the total e.m.f. when the cells are in parallel and which in series.
Date posted: November 1, 2017. Answers (1)
- Define the following terms (a) Closed circuit (b) Open circuit (c) Electromotive force (d) Lost volts(Solved)
Define the following terms
a. Closed circuit
b. Open circuit
c. Electromotive force
d. Lost volts
Date posted: November 1, 2017. Answers (1)
- Calculate the amount of current flowing through a bulb if 500 coulombs of charge flow through it in 5 minutes.(Solved)
Calculate the amount of current flowing through a bulb if 500 coulombs of charge flow through it in 5 minutes.
Date posted: November 1, 2017. Answers (1)
- Explain the following statements (i) A nylon shirt stick on the body and cracks when removed (ii) Tankers carrying fuel have loose chain hanging under them to touch the...(Solved)
Explain the following statements
i. A nylon shirt stick on the body and cracks when removed
ii. Tankers carrying fuel have loose chain hanging under them to touch the ground as they move.
iii. A glass window if wiped with a dry cloth on a dry day takes little time to become dusty
Date posted: November 1, 2017. Answers (1)
- List two applications of electrostatics(Solved)
List two applications of electrostatics
Date posted: November 1, 2017. Answers (1)
- Describe the process of charging by separation: having been supplied with two metal spheres with insulating stands, a polythene rod, woolen cloth, stand and thread.(Solved)
Describe the process of charging by separation: having been supplied with two metal spheres with insulating stands, a polythene rod, woolen cloth, stand and thread.
Date posted: November 1, 2017. Answers (1)
- State the charge acquired by a body using the contact method(Solved)
State the charge acquired by a body using the contact method
Date posted: November 1, 2017. Answers (1)
- You have been provided with polystyrene ball coated with aluminium paint, silk cloth, polythene rod, woolen cloth. Explain how one charges a conductor by contact...(Solved)
You have been provided with polystyrene ball coated with aluminium paint, silk cloth, polythene rod, woolen cloth. Explain how one charges a conductor by contact method.
Date posted: November 1, 2017. Answers (1)
- Explain what happens in the process of charging by induction.(Solved)
Explain what happens in the process of charging by induction.
Date posted: November 1, 2017. Answers (1)
- You have been provided with a polystyrene ball coated with aluminium, silk thread, glass rod, silk cloth, stand, polythene rod. Explain how you can charge...(Solved)
You have been provided with a polystyrene ball coated with aluminium, silk thread, glass rod, silk cloth, stand, polythene rod. Explain how you can charge a conductor by the induction method.
Date posted: November 1, 2017. Answers (1)
- Explain how a rise in the temperature of a gas causes rise in the pressure of the gas if the volume is kept constant(Solved)
Explain how a rise in the temperature of a gas causes rise in the pressure of the gas if the volume is kept constant
Date posted: November 1, 2017. Answers (1)
- Define friction and state the factors it depends on(Solved)
Define friction and state the factors it depends on
Date posted: November 1, 2017. Answers (1)