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i) Negative
ii)A – Beta radiation C – Alpha radiation
iii) C – more massive than A
sharon kalunda answered the question on April 5, 2019 at 14:30
- When carrying out experiments with radio active substance one is instructed that the source
should never held with bare hands but with forceps. Give a reason...(Solved)
When carrying out experiments with radio active substance one is instructed that the source
should never held with bare hands but with forceps. Give a reason for the instruction
Date posted: April 5, 2019. Answers (1)
- Uranium 235 was bombarded with a neutron and fission took place in the following manner:(Solved)
Uranium 235 was bombarded with a neutron and fission took place in the following manner:
Determine the values of a and b
Date posted: April 5, 2019. Answers (1)
- A manufacturer wishes to check the thickness of steel sheets he produces. Explain how
this can be done using a radioactive source and a counter(Solved)
A manufacturer wishes to check the thickness of steel sheets he produces. Explain how
this can be done using a radioactive source and a counter
Date posted: April 5, 2019. Answers (1)
- Alpha particles have low penetrating power as opposed to beta particles. Give a reason for this(Solved)
Alpha particles have low penetrating power as opposed to beta particles. Give a reason for this
Date posted: April 5, 2019. Answers (1)
- What evidence supports the fact that gamma rays are not charged(Solved)
What evidence supports the fact that gamma rays are not charged
Date posted: April 5, 2019. Answers (1)
- The half life of a radioactive element is 20minutes. The mass of the element after 120
minutes is 0.03125g. Determine the original mass of the element(Solved)
The half life of a radioactive element is 20minutes. The mass of the element after 120
minutes is 0.03125g. Determine the original mass of the element.
Date posted: April 5, 2019. Answers (1)
- Determine the value of x and y in the nuclear equation below:-(Solved)
Determine the value of x and y in the nuclear equation below:-
Date posted: April 5, 2019. Answers (1)
- You are provided with the following:-(Solved)
You are provided with the following:-
- One diode
-A load resistor
- An a.c. source
- One transformer
(i) Using the above apparatus draw a circuit arrangement for half wave rectification
(ii) Explain how the circuit drawn in (i) above achieves half wave rectification
Date posted: April 5, 2019. Answers (1)
- A radioactive element decays to 1/128 of its original activity after 49 days. Determine its
half –life(Solved)
A radioactive element decays to 1/128 of its original activity after 49 days. Determine its
half –life
Date posted: April 5, 2019. Answers (1)
- Below is a nuclear reaction(Solved)
Below is a nuclear reaction
i) Identify radiation K
ii) Determine the value of X and Y
Date posted: April 5, 2019. Answers (1)
- The figure shows the circuit of a modern X-ray tube(Solved)
The figure shows the circuit of a modern X-ray tube
Name the part labeled C and state its function
Date posted: April 5, 2019. Answers (1)
- The diagram below shows simplified diagram of an x-ray tube,(Solved)
The diagram below shows simplified diagram of an x-ray tube,
(a) Name the parts A, B, and C.
(b) What adjustments would be made to:
(i) Increase the penetrating power of the x-rays produced.
(ii) Increase the intensity of the rays produced.
(c) Name a suitable material for the part marked B and give a reason for your choice.
(d) Name a suitable material for the part marked C and sate its purpose.
(e) Why is it necessary to maintain a vacuum inside the tube?
Date posted: April 5, 2019. Answers (1)
- An x-ray tube is operating with an anode potential of 12Kv and a current of 10.0m.A:(Solved)
An x-ray tube is operating with an anode potential of 12Kv and a current of 10.0m.A:
(i) Calculate the number of electrons hitting the anode per second
(ii) Determine the velocity with which the electrons strike the target
Date posted: April 5, 2019. Answers (1)
- The figure below shows an x-ray tube:(Solved)
The figure below shows an x-ray tube:
(a) Indicate on the diagram the path of x-ray beam supplied by the tube
(b) Why is M set at angle of 45o relative to the electron beam?
(c) Name a suitable metal that can be used for part M and give a reason for your choice
(d) State how the following can be controlled:-
(i) Intensity
(ii) Penetrating power
(iii) The exposure to patients
Date posted: April 5, 2019. Answers (1)
- The table below shows the electromagnetic spectrum;(Solved)
The table below shows the electromagnetic spectrum;
i) Identify A and B
ii) State one use for each
Date posted: April 5, 2019. Answers (1)
- Arrange the following waves in order of increasing frequencies: microwaves, x-rays,
Infra-red, ultra-violet(Solved)
Arrange the following waves in order of increasing frequencies: microwaves, x-rays,
Infra-red, ultra-violet
Date posted: April 5, 2019. Answers (1)
- An x-ray tube must be highly evaluated. Give a reason for this(Solved)
An x-ray tube must be highly evaluated. Give a reason for this
Date posted: April 5, 2019. Answers (1)
- State the factor that affects:-
(i) The intensity of X-rays
(ii) The strength of X-rays(Solved)
State the factor that affects:-
(i) The intensity of X-rays
(ii) The strength of X-rays
Date posted: April 5, 2019. Answers (1)
- Give one use of X –rays in medicine(Solved)
Give one use of X –rays in medicine
Date posted: April 5, 2019. Answers (1)
- The figure shows a cross- section of a bicycle dynamo. The wheel is connected by an axle
to a permanent cylindrical magnet and is rotated by...(Solved)
The figure shows a cross- section of a bicycle dynamo. The wheel is connected by an axle
to a permanent cylindrical magnet and is rotated by the bicycle tyre
i) Explain why the bulb lights
ii) How can the bulb be made brighter
Date posted: April 5, 2019. Answers (1)