Nb. Pressure = force/area
Force = pressure x area
=90 x 10
=900N
Area = 300 cm^2
=300/10000 m^2
=0.03m^2
Thus pressure = 900/0.03 Nm^-2
=30000Nm^-2
joseph rimiru answered the question on October 18, 2017 at 17:39
-
The mass of space shuttle was found to be 500 kg. If it weight is 10000 N gravitational field strength of the planet.
(Solved)
The mass of space shuttle was found to be 500 kg. If it weight is 10000 N gravitational field strength of the planet.
Date posted:
October 18, 2017
.
Answers (1)
-
An astronaut weighs 1000 N on earth. On moon, he weight 200 N. Calculate the moon’s gravitational strength. (take g= 10 N kg^-1)
(Solved)
An astronaut weighs 1000 N on earth. On moon, he weight 200 N. Calculate the moon’s gravitational strength. (take g= 10 N kg^-1)
Date posted:
October 18, 2017
.
Answers (1)
-
State a property of electromagnetic wave on which the operation of a radar system is based
(Solved)
State a property of electromagnetic wave on which the operation of a radar system is based
Date posted:
October 17, 2017
.
Answers (1)
-
State two conditions necessary for the occurrence of an annular eclipse ...
(Solved)
State two conditions necessary for the occurrence of an annular eclipse
Date posted:
October 17, 2017
.
Answers (1)
-
Why does a gun recoil when it is fired?
(Solved)
Why does a gun recoil when it is fired?
Date posted:
October 17, 2017
.
Answers (1)
-
State the difference between an ideal and real gas
(Solved)
State the difference between an ideal and real gas
Date posted:
October 17, 2017
.
Answers (1)
-
Explain why it is possible to compress gases but not solid or liquid
(Solved)
Explain why it is possible to compress gases but not solid or liquid
Date posted:
October 17, 2017
.
Answers (1)
-
Explain how heat demagnetizes a magnet.
(Solved)
Explain how heat demagnetizes a magnet.
Date posted:
October 17, 2017
.
Answers (1)
-
What is the angle of deviation
(Solved)
What is the angle of deviation
Date posted:
October 17, 2017
.
Answers (1)
-
Define the following terms as used in sound.1. Pitch 2. Intensity
(Solved)
Define the following terms as used in sound.
1. Pitch
2. Intensity
Date posted:
October 17, 2017
.
Answers (1)
-
State two differences between heat and temperature.
(Solved)
State two differences between heat and temperature.
Date posted:
October 17, 2017
.
Answers (1)
-
Explain why a nail rubbed with oil penetrates timber easily when hammered than a dry nail.
(Solved)
Explain why a nail rubbed with oil penetrates timber easily when hammered than a dry nail.
Date posted:
October 17, 2017
.
Answers (1)
-
Name the most suitable instrument for measuring the diameter of a thin wire or strand of hair.
(Solved)
Name the most suitable instrument for measuring the diameter of a thin wire or strand of hair.
Date posted:
October 17, 2017
.
Answers (1)
-
2000 cm^3 of fresh water of density 1000 cm^3 is mixed with 3200 cm^3 of sea water of density 1025 cm^3. Calculate the density of...
(Solved)
2000 cm^3 of fresh water of density 1000 cm^3 is mixed with 3200 cm^3 of sea water of density 1025 cm^3. Calculate the density of the mixture.
Date posted:
October 16, 2017
.
Answers (1)
-
The mass of a substance is always constant whether an object is on the moon or the earth or any other planet. Explain.
(Solved)
The mass of a substance is always constant whether an object is on the moon or the earth or any other planet. Explain.
Date posted:
October 16, 2017
.
Answers (1)
-
The mass of a density bottle is 20 g when empty and 45 g when filled with water. If it is filled with liquid x...
(Solved)
The mass of a density bottle is 20 g when empty and 45 g when filled with water. If it is filled with liquid x its mass is 400 g. Calculate the density of liquid x. (density of water 1.0 g/cm^3)
Date posted:
October 16, 2017
.
Answers (1)
-
When using a density bottle there are some precautions that should be observed. Mention two of them.
(Solved)
When using a density bottle there are some precautions that should be observed. Mention two of them.
Date posted:
October 16, 2017
.
Answers (1)
-
A rectangular tank measures 25.0 m long, 10.0 m wide and 2 m high. Calculate the mass of water in the tank when it is...
(Solved)
A rectangular tank measures 25.0 m long, 10.0 m wide and 2 m high. Calculate the mass of water in the tank when it is half full. (Density of water 1000 kg/m^3, assume these measurement are internally taken).
Date posted:
October 16, 2017
.
Answers (1)
-
The density of mercury is 13.6 g/cm^3. Find the volume of 4000 g of mercury in m^3.
(Solved)
The density of mercury is 13.6 g/cm^3. Find the volume of 4000 g of mercury in m^3.
Date posted:
October 16, 2017
.
Answers (1)
-
A block of glass in the laboratory was found to be 200 g, and it measured 6 cm, 5 cm, 1 cm. Calculate the density...
(Solved)
A block of glass in the laboratory was found to be 200 g, and it measured 6 cm, 5 cm, 1 cm. Calculate the density in kg/m^3.
Date posted:
October 16, 2017
.
Answers (1)