(a) Making the capillary bore more narrower
(b) Making the bulb thinner
john3 answered the question on November 8, 2017 at 12:08
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A bullet of mass 24g travelling in a horizontal path with a velocity of 450ms-1
strikes a wooden block of wood of mass 976g
resting...
(Solved)
A bullet of mass 24g travelling in a horizontal path with a velocity of 450ms-1
strikes a wooden block of wood of mass 976g
resting on a rough horizontal surface. After impact, the bullet and the block move together for a distance of 7.5m before
coming rest.
(a) Name the type of collision which takes place above (1 mark)
(b) What‘s the velocity of the two bodies when they start sliding (2 marks)
(c) Calculate the force which brings the two bodies to rest (3 marks)
(d) Determine the coefficient of friction between the block and the surface during this motion
Date posted:
November 2, 2017
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Answers (1)
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State the four advantages and the two disadvantages of alkaline accumulators over the lead-acid accumulators and the two disadvantages.
(Solved)
State the four advantages and the two disadvantages of alkaline accumulators over the lead-acid accumulators and the two disadvantages.
Date posted:
November 2, 2017
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Answers (1)
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In deriving the equation of continuity, what three assumptions are made?
(Solved)
In deriving the equation of continuity, what three assumptions are made?
Date posted:
November 2, 2017
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Answers (1)
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A partially inflated balloon at sea level becomes fully inflated at higher altitudes. Explain this observation.
(Solved)
A partially inflated balloon at sea level becomes fully inflated at higher altitudes. Explain this observation.
Date posted:
November 2, 2017
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Answers (1)
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Explain why a high jumper flexes his knees when landing on the ground.
(Solved)
Explain why a high jumper flexes his knees when landing on the ground.
Date posted:
November 2, 2017
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Answers (1)
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State any two ways of increasing the size of an image formed by a fixed pinhole camera
(Solved)
State any two ways of increasing the size of an image formed by a fixed pinhole camera
Date posted:
November 1, 2017
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Answers (1)
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A boy stands 400 cm from a large wall-mirror. He then walks slowly towards the mirror at a speed of 40 cm ...
(Solved)
A boy stands 400 cm from a large wall-mirror. He then walks slowly towards the mirror at a speed of 40 cm per second. What is the distance between him and his image after 5 second?
Date posted:
October 31, 2017
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Answers (1)
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(a)What is main purpose of the translucent screen on the pinhole camera? (b)a lamp placed 9 cm high stand in...
(Solved)
(a)What is main purpose of the translucent screen on the pinhole camera?
(b)a lamp placed 9 cm high stand in front of a pin hole camera at a distance of 27 cm. The camera screen is 12 cm from the pinhole. What is the height of the image on the screen?
Date posted:
October 31, 2017
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Answers (1)
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List four applications of convection in fluids.
(Solved)
List four applications of convection in fluids.
Date posted:
October 31, 2017
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Answers (1)
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List areas of application of expansion and contraction in solids
(Solved)
List areas of application of expansion and contraction in solids
Date posted:
October 31, 2017
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Answers (1)
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In designing a solar heater explain the following: (a) Why the pipe is fixed to a dark coloured collector plate (b) Why the pipe is made of copper
(Solved)
In designing a solar heater explain the following:
a. Why the pipe is fixed to a dark coloured collector plate.
b. Why the pipe is made of copper
c. Why the pipe is coiled several times
d. Why the collector plate is fixed to an insulator
e. Why the panel front is made of glass.
Date posted:
October 30, 2017
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Answers (1)
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State and explain two disadvantages of anomalous expansion of water.
(Solved)
State and explain two disadvantages of anomalous expansion of water.
Date posted:
October 27, 2017
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Answers (1)
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A driving gear wheel having 25 teeth engages with a second wheel with 100 teeth. If the gear system is 85% efficient, find the mechanical...
(Solved)
A driving gear wheel having 25 teeth engages with a second wheel with 100 teeth. If the gear system is 85% efficient, find the mechanical advantage.
Date posted:
October 27, 2017
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Answers (2)
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A student stands at a distance 400m from a wall and claps two pieces of wood. After the first clap the student claps whenever an...
(Solved)
A student stands at a distance 400m from a wall and claps two pieces of wood. After the first clap the student claps whenever an echo is heard from the wall. Another student starts a stopwatch at the first clap and stops it after the twentieth clap. The stopwatch records a time of 50 seconds. Find the speed of sound.
Date posted:
October 27, 2017
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Answers (1)
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Explain why the e.m.f of a dry cell drops if a large current is drawn for a short time and then recovers if allowed to...
(Solved)
Explain why the e.m.f of a dry cell drops if a large current is drawn for a short time and then recovers if allowed to rest.
Date posted:
October 27, 2017
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Answers (1)
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State two advantages of a force pump over lift pump
(Solved)
State two advantages of a force pump over lift pump
Date posted:
October 27, 2017
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Answers (1)
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The smell of rotten eggs broken in a room spread throughout the room. Explain.
(Solved)
The smell of rotten eggs broken in a room spread throughout the room. Explain.
Date posted:
October 26, 2017
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Answers (1)
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Diffusion support the idea that matter is made up of small particles. Explain.
(Solved)
Diffusion support the idea that matter is made up of small particles. Explain.
Date posted:
October 26, 2017
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Answers (1)
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Some pollen grains were placed in water, explain how their motion supports the idea that matter is in continuous state of motion.
(Solved)
Some pollen grains were placed in water, explain how their motion supports the idea that matter is in continuous state of motion.
Date posted:
October 26, 2017
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Answers (1)
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The barometer in a city was found to be 70 cmHg. Given that the standard atmospheric pressure is 75 cmHg and the density of mercury...
(Solved)
The barometer in a city was found to be 70 cmHg. Given that the standard atmospheric pressure is 75 cmHg and the density of mercury is 13600kg/m^3, determine the altitude of the city. (density of air is 125kg/m^3)
Date posted:
October 26, 2017
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Answers (1)