QU2 a). Two waves, Y1 = 3 sin (25t + 10x) and Y2 = 3sin (25t -10x); are superimposed on each other in a medium. i). Determine the equation of the new wave generated. ii). From the equation in 2ai), describe the characteristics of a stationary wave.
QU2 a). Two waves, Y1 = 3 sin (25t + 10x) and Y2 = 3sin (25t -10x); are superimposed on each other in a medium. i). Determine the equation of the new wave generated. ii). From the equation in 2ai), describe the characteristics of a stationary wave.
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![QU2
a). Two waves, Y1= 3 sin (25t + 10x) and Y2= 3sin (25t -10x); are superimposed
on each other in a medium. i). Determine the equation of the new wave
generated.
ii). From the equation in 2ai), describe the characteristics of a stationary wave.
b). An ultrasound scan is more suitable for a pregnant woman than an X-ray
scan. Give reasons for the assertion.
c). Sketch the electromagnetic spectrum and determine one uses of each
QU3
a). An ice block at -12 °C, and of mass 3kg is completely converted into steam
at 120 °C. Determine the heat involved in the process. Is the heat absorbed or
released?
[ shc of ice =2100 J/Kg/K ; shc of water = 4200J/Kg/K; ly=2260KJ/Kg ; lf
=336000J/Kg ; shc of steam =2000J/Kg/K ]
%3D
b). A cube of length 24cm is heated through a change in temperature of 80°C.
If the coefficient of linear expansivity is 3.02 x 105/K , what is the new volume
of the cube?
c). A conductor transfers heat of 1500 J across its length of 20cm in 6 seconds.
Given that its cross-sectional area A is 55cm?. Determine the thermal
conductivity of the material if the temperature difference across the ends is
67°C?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbb5a5333-1046-408f-807e-6ba066392c1b%2F6c41a493-7aa6-4a24-9101-9fb43ce18e69%2Fmvc5om7_processed.jpeg&w=3840&q=75)
Transcribed Image Text:QU2
a). Two waves, Y1= 3 sin (25t + 10x) and Y2= 3sin (25t -10x); are superimposed
on each other in a medium. i). Determine the equation of the new wave
generated.
ii). From the equation in 2ai), describe the characteristics of a stationary wave.
b). An ultrasound scan is more suitable for a pregnant woman than an X-ray
scan. Give reasons for the assertion.
c). Sketch the electromagnetic spectrum and determine one uses of each
QU3
a). An ice block at -12 °C, and of mass 3kg is completely converted into steam
at 120 °C. Determine the heat involved in the process. Is the heat absorbed or
released?
[ shc of ice =2100 J/Kg/K ; shc of water = 4200J/Kg/K; ly=2260KJ/Kg ; lf
=336000J/Kg ; shc of steam =2000J/Kg/K ]
%3D
b). A cube of length 24cm is heated through a change in temperature of 80°C.
If the coefficient of linear expansivity is 3.02 x 105/K , what is the new volume
of the cube?
c). A conductor transfers heat of 1500 J across its length of 20cm in 6 seconds.
Given that its cross-sectional area A is 55cm?. Determine the thermal
conductivity of the material if the temperature difference across the ends is
67°C?
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