Get premium membership and access questions with answers, video lessons as well as revision papers.
Pressure = force / area = 840 / 0.042 = 20,000 Nm-2
.
Moraa orina answered the question on April 4, 2018 at 17:46
- Differentiate between scalar and vector quantity giving examples(Solved)
Differentiate between scalar and vector quantity giving examples
Date posted: April 3, 2018. Answers (1)
- Explain the differences between mass and weight(Solved)
Explain the differences between mass and weight
Date posted: April 3, 2018. Answers (1)
-
An astronaut weighs 900 N on earth. On the moon he weighs 150 N. Calculate the moons’
gravitational strength. (Take g = 10 N/kg)(Solved)
An astronaut weighs 900 N on earth. On the moon he weighs 150 N. Calculate the moons’
gravitational strength. (Take g = 10 N/kg)
Date posted: April 3, 2018. Answers (1)
- What is induction? What is earthing?(Solved)
What is induction?
What is earthing?
Date posted: April 3, 2018. Answers (1)
- 100 cm3
of fresh water of density 1,000 kgm-3
is mixed with 100 cm3
of sea water of density
1030 kgm-3
. Calculate the density of the mixture(Solved)
100 cm3
of fresh water of density 1,000 kgm-3
is mixed with 100 cm3
of sea water of density
1030 kgm-3
. Calculate the density of the mixture
Date posted: April 3, 2018. Answers (1)
- The mass of an empty density bottle is 20 g. Its mass when filled with water is 40.0 g and
50.0 g when filled with...(Solved)
The mass of an empty density bottle is 20 g. Its mass when filled with water is 40.0 g and
50.0 g when filled with liquid X. Calculate the density of liquid X if the density of water is
1,000 kgm-3
.
Date posted: April 3, 2018. Answers (1)
- The relative density of some type of wood is 0.8. Find the density of the wood in kg/m3(Solved)
The relative density of some type of wood is 0.8. Find the density of the wood in kg/m3
Date posted: April 3, 2018. Answers (1)
- The density of concentrated sulphuric acid is 1.8 g/cm3
. Calculate the volume of 3.1
kg of the acid.(Solved)
The density of concentrated sulphuric acid is 1.8 g/cm3
. Calculate the volume of 3.1
kg of the acid.
Date posted: April 3, 2018. Answers (1)
- A block of glass of mass 187.5 g is 5.0 cm long, 2.0 cm thick and 7.5 cm high.
Calculate the density of the glass...(Solved)
A block of glass of mass 187.5 g is 5.0 cm long, 2.0 cm thick and 7.5 cm high.
Calculate the density of the glass in kgm-3
.
Date posted: April 3, 2018. Answers (1)
- State the basic safety laboratory rules(Solved)
State the basic safety laboratory rules
Date posted: April 3, 2018. Answers (1)
- Example
100 cm3
of fresh water of density 1,000 kgm-3
is mixed with 100 cm3
of sea water of density
1030 kgm-3
. Calculate the density of the mixture.(Solved)
Example
100 cm3
of fresh water of density 1,000 kgm-3
is mixed with 100 cm3
of sea water of density
1030 kgm-3
. Calculate the density of the mixture.
Date posted: April 3, 2018. Answers (1)
- Explain why lightning is seen when there is thunderstorm(Solved)
Explain why lightning is seen when there is thunderstorm.
Date posted: April 2, 2018. Answers (1)
- What is mass number (Solved)
What is mass number?
Date posted: April 1, 2018. Answers (1)
- Differentiate between temperature and heat(Solved)
Differentiate between temperature and heat.
Date posted: March 27, 2018. Answers (1)
- A polar bear appears to be upside down in the sky. Explain(Solved)
A polar bear appears to be upside down in the sky. Explain
Date posted: March 26, 2018. Answers (1)
- A vibrator generates 120 waves in 5 seconds.The distance between successive crests of the waves is 8cm. Determine the time taken by the waves to...(Solved)
A vibrator generates 120 waves in 5 seconds.The distance between successive crests of the waves is 8cm. Determine the time taken by the waves to travel a distance of 150m.
Date posted: March 25, 2018. Answers (1)
- What is mechanical physics?(Solved)
What is mechanical physics?
Date posted: March 23, 2018. Answers (1)
- A machine has an efficiency of 80%.if the machine is required to overcome a load of 60N with a force of 40N. Calculate the velocity ratio?(Solved)
A machine has an efficiency of 80%.if the machine is required to overcome a load of 60N with a force of 40N. Calculate the velocity ratio?
Date posted: March 22, 2018. Answers (1)
- Distinguish between momentum and impulse (Solved)
Distinguish between momentum and impulse.
Date posted: March 21, 2018. Answers (1)
- State and explain two forms of mechanical energy(Solved)
State two forms of mechanical energy
Date posted: March 20, 2018. Answers (1)