Direction is constantly changing hence velocity
joseph rimiru answered the question on January 1, 2018 at 19:26
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A syringe contains 100 cm^3 of air at atmospheric pressure. The atmospheric pressure is 1.0 × 10^5 Pascal. The open end of the syringe is...
(Solved)
A syringe contains 100 cm^3 of air at atmospheric pressure. The atmospheric pressure is 1.0 × 10^5 Pascal. The open end of the syringe is sealed and the piston is pushed inwards until the air occupies a volume of 40 cm^3.The temperature of the air remains constant. Calculate the new pressure of the air in the syringe.
Date posted:
January 1, 2018
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Answers (1)
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A box is lying on the floor of a fast moving truck; it is observed that when the lorry is suddenly brought to rest,...
(Solved)
A box is lying on the floor of a fast moving truck; it is observed that when the lorry is suddenly brought to rest, the final position of the box is nearer to the lorry than before. Explain this observation.
Date posted:
January 1, 2018
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Answers (1)
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State three differences between the eye and the camera
(Solved)
State three differences between the eye and the camera.
Date posted:
December 29, 2017
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Answers (1)
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Explain how thunder and lightning is produced during rainstorm.
(Solved)
Explain how thunder and lightning is produced during rainstorm.
Date posted:
December 29, 2017
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Answers (1)
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Ether is put in a beaker which is placed on a thin film of water. A student blows the ether through a pipe continuously, state and...
(Solved)
Ether is put in a beaker which is placed on a thin film of water. A student blows the ether through a pipe continuously, state and explain the observation made after some time.
Date posted:
December 18, 2017
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Answers (1)
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It is observed that during a total eclipse of the sun, both light and heat disappear simultaneously. Explain the observation
(Solved)
It is observed that during a total eclipse of the sun, both light and heat disappear simultaneously. Explain the observation.
Date posted:
December 14, 2017
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Answers (1)
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An n-type semiconductor is obtained when germanium crystal is doped with arsenic. Explain how this change occurs. (N/B. Number of electrons in the outer...
(Solved)
An n-type semiconductor is obtained when germanium crystal is doped with arsenic. Explain how this change occurs. (N/B. Number of electrons in the outer most shell for germanium = 4, and arsenic = 5
Date posted:
December 14, 2017
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Answers (1)
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What is meant by an extrinsic semiconductor?
(Solved)
What is meant by an extrinsic semiconductor?
Date posted:
December 14, 2017
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Answers (1)
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Explain how doping produces an n-type semiconductor for a pure semiconductor material
(Solved)
Explain how doping produces an n-type semiconductor for a pure semiconductor material.
Date posted:
December 14, 2017
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Answers (1)
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Explain why one feels colder when walking on a concrete floor than on a wooden carpet
(Solved)
Explain why one feels colder when walking on a concrete floor than on a wooden carpet.
Date posted:
December 13, 2017
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Answers (1)
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A pure sample of silicon can be changed into p-type semi conductor by adding an impurity. Explain how this is achieved.
(Solved)
A pure sample of silicon can be changed into p-type semi conductor by adding an impurity. Explain how this is achieved.
Date posted:
December 12, 2017
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Answers (1)
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Describe how a p-type semiconductor is formed as explained in electronic study.
(Solved)
Describe how a p-type semiconductor is formed as explained in electronic study.
Date posted:
December 12, 2017
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Answers (1)
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State three advantages of using GM tube instead of a diffusion cloud chamber to detect radiations from radiations from radioactive substance.
(Solved)
State three advantages of using GM tube instead of a diffusion cloud chamber to detect radiations from radiations from radioactive substance.
Date posted:
December 12, 2017
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Answers (1)
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Explain why some of the tracks formed in a diffusion chamber are observed to be:
a. Short
b. Straight
(Solved)
Explain why some of the tracks formed in a diffusion chamber are observed to be:
a. Short
b. Straight
Date posted:
December 12, 2017
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Answers (1)
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The half life of a radioactive substance is 12 years. Determine the time it would take to decay to 12.5% of it original value....
(Solved)
The half life of a radioactive substance is 12 years. Determine the time it would take to decay to 12.5% of it original value.
Date posted:
December 12, 2017
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Answers (1)
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An element x has a half life of 3.83 days. If a sample of this element is found to disintegration per second at a particular...
(Solved)
An element x has a half life of 3.83 days. If a sample of this element is found to disintegration per second at a particular time. Determine its activity rate after 19.15 days.
Date posted:
December 12, 2017
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Answers (1)
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Short thick track were observed when a radiation was released into a diffusion cloud chamber. State with a reason the type of radiation was...
(Solved)
Short thick track were observed when a radiation was released into a diffusion cloud chamber. State with a reason the type of radiation was detected.
Date posted:
December 12, 2017
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Answers (1)
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A certain sample of radioactive material has a half life of 130 days and has 1.0 x 10^20 atoms initially. Determine the number of radioactive...
(Solved)
A certain sample of radioactive material has a half life of 130 days and has 1.0 x 10^20 atoms initially. Determine the number of radioactive atoms that have decayed after 390 days.
Date posted:
December 11, 2017
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Answers (1)
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A radioactive Cobalt 60 has a half life of 5.25 years. What fraction of the original atoms in a sample will remain after 21 years?
(Solved)
A radioactive Cobalt 60 has a half life of 5.25 years. What fraction of the original atoms in a sample will remain after 21 years?
Date posted:
December 11, 2017
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Answers (1)
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A radioactive substance activity, initially at 400 counts per seconds reduces to 50 counts per second in 72 minutes. Determine the half-life of the substances.
(Solved)
A radioactive substance activity, initially at 400 counts per seconds reduces to 50 counts per second in 72 minutes. Determine the half-life of the substances.
Date posted:
December 11, 2017
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Answers (1)