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Q = x-ray
Kavungya answered the question on November 4, 2019 at 10:29
- The figure below shows two plane mirrors inclined at 450 to one another. A ray of light is incident to the top mirror at 450.
Draw...(Solved)
The figure below shows two plane mirrors inclined at 450 to one another. A ray of light is incident to the top mirror at 450.
Draw the path followed by the ray after reflection.
Date posted: November 4, 2019. Answers (1)
- The table below shows data collected during investigation of Hooke’s law.
a). Complete the table.
b). Using the data in the table, plot a graph of force,...(Solved)
The table below shows data collected during investigation of Hooke’s law.
a). Complete the table.
b). Using the data in the table, plot a graph of force, F against extension, e in the attached gird below.
c). On the graph, indicate X, at the elastic limit
d). From the graph, determine the elastic spring constant for the material.
Date posted: November 4, 2019. Answers (1)
- A 2kg particle tied to rope is rotated about a circle of radius 10 m. given that the maximum tension allowed in the rope is...(Solved)
A 2kg particle tied to rope is rotated about a circle of radius 10 m. given that the maximum tension allowed in the rope is 50 N, determine the maximum speed of the particle if it is rotating in a:-
i). horizontal path.
ii). vertical path.
Date posted: November 4, 2019. Answers (1)
- What is the difference between uniform linear motion and uniform circular motion?(Solved)
What is the difference between uniform linear motion and uniform circular motion?
Date posted: November 4, 2019. Answers (1)
- What property of a gas makes it suitable for inflating tubes? (Solved)
What property of a gas makes it suitable for inflating tubes?
Date posted: November 4, 2019. Answers (1)
- The figure below shows a 4m long uniform metal rod balanced horizontally when two forces act on it as shown.
Determine the value of F given...(Solved)
The figure below shows a 4m long uniform metal rod balanced horizontally when two forces act on it as shown.
Determine the value of F given that the rod weighs 8 N.
Date posted: November 4, 2019. Answers (1)
- Name one scientific skill learnt in a physics practical class. (Solved)
Name one scientific skill learnt in a physics practical class.
Date posted: November 4, 2019. Answers (1)
- The temperature of water in a measuring cylinder is raised from 0oC to 15oC. Sketch the graph of volume against temperature. (Solved)
The temperature of water in a measuring cylinder is raised from 0oC to 15oC. Sketch the graph of volume against temperature.
Date posted: November 4, 2019. Answers (1)
- The figure below shows air blown into a major tube attached to two minor tubes that have been immersed in water. Explain what is observed...(Solved)
The figure below shows air blown into a major tube attached to two minor tubes that have been immersed in water. Explain what is observed then indicate the levels of water in the tubes of beaker X and Y.
Date posted: November 4, 2019. Answers (1)
- Two identical springs in figure below, each of spring constant 6N/cm has negligible weight. They are used to support a load of 4 kg as...(Solved)
Two identical springs in figure below, each of spring constant 6N/cm has negligible weight. They are used to support a load of 4 kg as shown. Determine the total extension of the system.
Date posted: November 4, 2019. Answers (1)
- Figure below shows non-uniform horizontal pipe.
If velocity at point A is 10ms-1 and that of point B of cross-section area 40cm2 is 6ms-1. What is...(Solved)
Figure below shows non-uniform horizontal pipe.
If velocity at point A is 10ms-1 and that of point B of cross-section area 40cm2 is 6ms-1. What is the cross-section area of the narrow part of the pipe?
Date posted: November 4, 2019. Answers (1)
- The micrometer screw gauge shown in figure below had a zero error of – 0.05 mm and was used to measure the diameter of a...(Solved)
The micrometer screw gauge shown in figure below had a zero error of – 0.05 mm and was used to measure the diameter of a steel ball bearing.
Find the radius of the ball bearing whose diameter is recorded by the instrument.
Date posted: November 4, 2019. Answers (1)
- Why do you think we experience more discomfort in hot humid weather than we do in hot dry weather.(Solved)
Why do you think we experience more discomfort in hot humid weather than we do in hot dry weather.
Date posted: October 30, 2019. Answers (1)
- In demagnetization by electrical method:
i) State the type of current used.
ii) Explain your answer in (i) above.(Solved)
In demagnetization by electrical method:
i) State the type of current used.
ii) Explain your answer in (i) above.
Date posted: October 30, 2019. Answers (1)
- The figure below shows a method of magnetization used in making magnets.
i)Name the method.
ii) Identify the polarities A and B of the magnet produced.
iii) Apart...(Solved)
The figure below shows a method of magnetization used in making magnets.
i)Name the method.
ii) Identify the polarities A and B of the magnet produced.
iii) Apart from this method, state any other method used in magnetization.
Date posted: October 30, 2019. Answers (1)
- A surface whose work function is 2.46eV is illuminated by light of frequency 3.0×1015Hz. Calculate the maximum kinetic energy of the ejected photoelectrons. (Solved)
A surface whose work function is 2.46eV is illuminated by light of frequency 3.0×1015Hz. Calculate the maximum kinetic energy of the ejected photoelectrons.
Date posted: October 30, 2019. Answers (1)
- The figure below shows a set up that was used to demonstrate the photoelectric effect.
i)If the electroscope was negatively charged, State the observation made.
ii) Explain...(Solved)
The figure below shows a set up that was used to demonstrate the photoelectric effect.
i)If the electroscope was negatively charged, State the observation made.
ii) Explain your answer in (i) above.
iii) State and explain what would happen if the electroscope was positively charged.
Date posted: October 30, 2019. Answers (1)
- The figure below shows the essential components of an x-ray tube
a)Name the parts labelled A and B.
b)Explain how electrons are produced.
c)During the operation of the...(Solved)
The figure below shows the essential components of an x-ray tube
a)Name the parts labelled A and B.
b)Explain how electrons are produced.
c)During the operation of the tube, the target becomes very hot.
i)Explain how this heat is caused.
ii)State any two ways in which cooling can be achieved.
d)Explain why:
i)The tube is evacuated.
ii)The cathode is concave shaped.
Date posted: October 30, 2019. Answers (1)
- A transformer uses 240V a.c supply to deliver 9.0A at 80V to a heating coil. If 10% of the energy taken from the supply is...(Solved)
A transformer uses 240V a.c supply to deliver 9.0A at 80V to a heating coil. If 10% of the energy taken from the supply is lost in the transformer itself, determine the current in the primary winding.
Date posted: October 30, 2019. Answers (1)
- A fishing boat uses ultrasound of frequency 6.0×104Hz to detect fish directly below. Two echoes of the ultrasound are received, one after 0.09 seconds coming...(Solved)
A fishing boat uses ultrasound of frequency 6.0×104Hz to detect fish directly below. Two echoes of the ultrasound are received, one after 0.09 seconds coming from the shoal of fish and the other after 0.12 seconds coming from the sea bed. The sea bed is 84m below the ultrasound transceiver.
i) State two reasons why ultrasound is preferred.
ii) Calculate the speed of the ultrasound waves in water.
Date posted: October 30, 2019. Answers (1)