The dry cells supplies very little current compared with the 12 volts battery used to start a car
joseph rimiru answered the question on April 11, 2018 at 06:08
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The master cylinder piston in a car braking system has a diameter of 2.0 cm. The
effective area of the brake pads on each of...
(Solved)
The master cylinder piston in a car braking system has a diameter of 2.0 cm. The
effective area of the brake pads on each of the four wheels is 30 cm2
. The driver
exerts a force of 500 n on the brake pedal. Calculate
a) The pressure in the master cylinder
b) The total braking force in the car.
Date posted:
April 4, 2018
.
Answers (1)
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The area of the smaller piston of a hydraulic press is 0.01 m2 and that of the bigger piston is 0.5 m2. If the force...
(Solved)
The area of the smaller piston of a hydraulic press is 0.01 m2
and that of the bigger
piston is 0.5 m. If the force applied to the smaller piston is 2 N, what force is
transmitted to the larger piston?
Date posted:
April 4, 2018
.
Answers (1)
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Explain how a hydraulic press works
(Solved)
Explain how a hydraulic press works
Date posted:
April 4, 2018
.
Answers (1)
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Describe how a hydraulic brake system works
(Solved)
Describe how a hydraulic brake system works
Date posted:
April 4, 2018
.
Answers (1)
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Explain the applications of pressure in gases and liquids
(Solved)
Explain the applications of pressure in gases and liquids
Date posted:
April 4, 2018
.
Answers (1)
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The height of the mercury column in a barometer is found to be 67.0 cm at a certain place.
What would be the height of...
(Solved)
The height of the mercury column in a barometer is found to be 67.0 cm at a certain place.
What would be the height of a water barometer at the same place? (densities of mercury-
1.36 × 104
kg/m3
and water- 1.0 × 103
kg/m3
).
Date posted:
April 4, 2018
.
Answers (1)
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The density of mercury is 13,600 kgm-3
. Determine the liquid pressure at a point 76 cm
below the surface of mercury. (Take g = 10...
(Solved)
The density of mercury is 13,600 kgm-3
. Determine the liquid pressure at a point 76 cm
below the surface of mercury. (Take g = 10 Nkg-1
)
S
Date posted:
April 4, 2018
.
Answers (1)
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A diver is 10 m below the surface of water in a dam. If the density of water is 1,000 kgm-3
, determine the pressure due...
(Solved)
A diver is 10 m below the surface of water in a dam. If the density of water is 1,000 kgm-3
, determine the pressure due to the water on the diver. (Take g = 10 Nkg-1
)
Date posted:
April 4, 2018
.
Answers (1)
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A man of mass 84 kg stands upright on a floor. If the area of contact of his shoes and
the floor is 420 cm2
,...
(Solved)
A man of mass 84 kg stands upright on a floor. If the area of contact of his shoes and
the floor is 420 cm2
, determine the average pressure he exerts on the floor. (Take g =
10 N/Kg)
Date posted:
April 4, 2018
.
Answers (1)
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Differentiate between scalar and vector quantity giving examples
(Solved)
Differentiate between scalar and vector quantity giving examples
Date posted:
April 3, 2018
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Answers (1)
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Explain the differences between mass and weight
(Solved)
Explain the differences between mass and weight
Date posted:
April 3, 2018
.
Answers (1)
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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)
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What is induction? What is earthing?
(Solved)
What is induction?
What is earthing?
Date posted:
April 3, 2018
.
Answers (1)
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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)
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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)
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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)
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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)
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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)
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State the basic safety laboratory rules
(Solved)
State the basic safety laboratory rules
Date posted:
April 3, 2018
.
Answers (1)
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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)