- 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. Answers (1)
- 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. Answers (1)
- Explain the three types of flow(Solved)
Explain the Three types of flow
Date posted: April 8, 2018. Answers (1)
- Explain the factors affecting speed of sound in air(Solved)
Explain the factors affecting speed of sound in air
Date posted: April 8, 2018. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- State and explain the types of waves(Solved)
State and explain the types of waves
Date posted: April 8, 2018. Answers (1)
- State the properties of materials(Solved)
State the properties of materials
Date posted: April 8, 2018. Answers (1)
- State the applications of spherical mirrors(Solved)
State the applications of spherical mirrors
Date posted: April 8, 2018. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- Differentiate between conductors and insulators giving examples(Solved)
Differentiate between conductors and insulators giving examples
Date posted: April 7, 2018. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- State the applications of reflection at plane surfaces(Solved)
State the applications of reflection at plane surfaces
Date posted: April 7, 2018. Answers (1)