Dangers of Bernoulli’s effect
? Blowing of roof tops- when a fast moving air passes above a roof top, the air pressure above the roof will be higher than that below it. Thus the resultant upwards force acting on the roof may blow it off if it is large enough.
? Car accidents- when a small car and a large truck both travelling at high speeds and in opposite
directions overtake each other, the small car is likely to be dragged onto the truck. The speed of air
between the car and the truck is very high and hence a low pressure exists between them. The resultant
inward force acting them draws them closer together. The car being lighter has a higher chance of being
dragged onto the truck, causing an accident.
Moraa orina answered the question on April 8, 2018 at 16:26
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Explain the applications of Bernoulli’s principle
(Solved)
Explain the applications of Bernoulli’s principle
Date posted:
April 8, 2018
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Answers (1)
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A lawn sprinkler has 40holes each of cross-section area 2.0 x10-2cm2. It is connected to a horse pipe of
cross-section area 1.6cm2. if the speed...
(Solved)
A lawn sprinkler has 40holes each of cross-section area 2.0 x10-2cm2. It is connected to a horse pipe of
cross-section area 1.6cm2. if the speed of water in the horse pipe is 1.2m/s, calculate:
a) The rate of flow in the horse pipe.
b) The speed at which water emerges from the holes.
Date posted:
April 8, 2018
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Answers (1)
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600g of water flows through a tube of uniform cross-section area of 20 cm^2 in 10 s. If the density of water is 1000 kgm-3, calculate the...
(Solved)
600g of water flows through a tube of uniform cross-section area of 20cm2 in 10s. If the density of water is 1000kgm-3, calculate the rate of flow of the water.
Date posted:
April 8, 2018
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Explain the three types of flow
(Solved)
Explain the Three types of flow
Date posted:
April 8, 2018
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Explain the factors affecting speed of sound in air
(Solved)
Explain the factors affecting speed of sound in air
Date posted:
April 8, 2018
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Answers (1)
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A student standing between two cliffs and 500m from the nearer cliff clapped his hands and heard the first
echo after 3s and the second...
(Solved)
A student standing between two cliffs and 500m from the nearer cliff clapped his hands and heard the first
echo after 3s and the second echo 2s later. Calculate:
a) the speed of the sound in air
b) the distance between the cliffs
Date posted:
April 8, 2018
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Answers (1)
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A man makes a loud sound and hears an echo of the sound 1.2s later. If the speed of sound in air is 330m/s, calculate...
(Solved)
A man makes a loud sound and hears an echo of the sound 1.2s later. If the speed of sound in air is 330m/s, calculate the distance between the man and the object reflecting the sound.
Date posted:
April 8, 2018
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Answers (1)
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The wheel of a car is rotated at 120 revolutions per second, calculate: (a) The period, T (b) The speed of the waves generated if the wavelength...
(Solved)
The wheel of a car is rotated at 120 revolutions per second, calculate:
a) The period, T
b) The speed of the waves generated if the wavelength is 1.5 * 10-2m.
Date posted:
April 8, 2018
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Answers (1)
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A source of waves has a frequency of 512Hz. Calculate the wavelength of the waves produced if the speed of the waves is 330m/s.
(Solved)
A source of waves has a frequency of 512Hz. Calculate the wavelength of the waves produced if the speed of the waves is 330m/s.
Date posted:
April 8, 2018
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Answers (1)
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State the types of waves in terms of propagation of particles
(Solved)
State the types of waves in terms of propagation of particles
Date posted:
April 8, 2018
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Answers (1)
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State and explain the types of waves
(Solved)
State and explain the types of waves
Date posted:
April 8, 2018
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State the properties of materials
(Solved)
State the properties of materials
Date posted:
April 8, 2018
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State the applications of spherical mirrors
(Solved)
State the applications of spherical mirrors
Date posted:
April 8, 2018
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Answers (1)
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A convex mirror of focal length 9cm produces an image on its axis 6cm from the mirror. Determine the
position of the object.
(Solved)
A convex mirror of focal length 9cm produces an image on its axis 6cm from the mirror. Determine the
position of the object.
Date posted:
April 8, 2018
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Answers (1)
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Determine the position, size and nature of the image of an object 4cm tall placed on the principal axis of a
concave mirror of focal...
(Solved)
Determine the position, size and nature of the image of an object 4cm tall placed on the principal axis of a
concave mirror of focal length 15cm at a distance 30cm from the mirror.
Date posted:
April 8, 2018
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Answers (1)
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The charge stored by a cell A of plate dimensions 0.2m*0.2m is 108000C.
a) What charge is stored in cell B of plate dimensions 0.4m*0.4m?
(Solved)
The charge stored by a cell A of plate dimensions 0.2m*0.2m is 108000C.
a) What charge is stored in cell B of plate dimensions 0.4m*0.4m?
Date posted:
April 7, 2018
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Answers (1)
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What is the capacity of a cell which can supply current of 250 mA for 4 hours?
(Solved)
What is the capacity of a cell which can supply current of 250 mA for 4 hours?
Date posted:
April 7, 2018
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Answers (1)
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Differentiate between conductors and insulators giving examples
(Solved)
Differentiate between conductors and insulators giving examples
Date posted:
April 7, 2018
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Answers (1)
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Charge of 180C flows through a conductor for 3 minutes. Calculate the current flowing through the conductor.
(Solved)
Charge of 180C flows through a conductor for 3 minutes. Calculate the current flowing through the
conductor.
Date posted:
April 7, 2018
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Answers (1)
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If the current in a circuit is 2A, calculate:
a) The charge that crosses a point in the circuit in 0.6s.
b) The number of electrons crossing...
(Solved)
If the current in a circuit is 2A, calculate:
a) The charge that crosses a point in the circuit in 0.6s.
b) The number of electrons crossing the point per second. Take e=1.6*10-19C.
Date posted:
April 7, 2018
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Answers (1)