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X-rays, UV light, blue light, infra red and radio waves.
Moraa orina answered the question on April 11, 2018 at 17:28
- An X-ray machine produces a radiation of wavelength 1.0x10-11m. calculate:
a) The frequency of the radiation.
b) The energy content of the radiation. (Solved)
An X-ray machine produces a radiation of wavelength 1.0x10-11m. calculate:
a) The frequency of the radiation.
b) The energy content of the radiation.
Date posted: April 11, 2018. Answers (1)
- A radio transmitter produces waves of frequency 1.0x108Hz. Calculate the wavelength of the signal.(Solved)
A radio transmitter produces waves of frequency 1.0x108Hz. Calculate the wavelength of the signal.
Date posted: April 11, 2018. Answers (1)
- A cyclist who is travelling at 20m/s negotiates a bend of radius 45m. he inclines at an angle O to the
vertical. Calculate:
a) The centripetal...(Solved)
A cyclist who is travelling at 20m/s negotiates a bend of radius 45m. he inclines at an angle Ɵ to the
vertical. Calculate:
a) The centripetal acceleration
b) The angle of inclination Ɵ
Date posted: April 11, 2018. Answers (1)
- A vehicle moves round a banked balanced road at a speed of 20m/s. if the radius of the road is 50m,
calculate the angle of...(Solved)
A vehicle moves round a banked balanced road at a speed of 20m/s. if the radius of the road is 50m,
calculate the angle of banking.
Date posted: April 11, 2018. Answers (1)
- The maximum speed at which a motorist can negotiate a corner on a level ground is 20m/s. if the radius
of the curve is 100m,...(Solved)
The maximum speed at which a motorist can negotiate a corner on a level ground is 20m/s. if the radius
of the curve is 100m, calculate:
a) The coefficient of friction, μ
b) The angle at which the road should be banked to enable the motorist negotiate the corner at a critical
speed of 20m/s.
Date posted: April 11, 2018. Answers (1)
- A bob of mass 1kg is moving in a uniform circular path in a vertical plane of radius 1m. If it is whirled at...(Solved)
A bob of mass 1kg is moving in a uniform circular path in a vertical plane of radius 1m. If it is whirled at a
frequency of 2 cycles per second, calculate:
a) The tension in the string when the bob is at the top part of the circle
b) Tension when it is at the bottom
c) At what position is the string likely to break? Why?
d) What is the minimum speed required to maintain the string under tension.
Date posted: April 11, 2018. Answers (1)
- An object of mass 0.4kg is rotated by a string at a constant speed, v in a vertical circle of radius 1m. If the
minimum...(Solved)
An object of mass 0.4kg is rotated by a string at a constant speed, v in a vertical circle of radius 1m. If the
minimum tension in the string is 3N, calculate :
a) The speed, v
b) Maximum tension in the string
c) The tension when the string is just horizontal
Date posted: April 11, 2018. Answers (1)
- An object of mass 8kg is whirled round rapidly in a vertical circle of radius 2m with a constant speed of
6m/s. Calculate the maximum...(Solved)
An object of mass 8kg is whirled round rapidly in a vertical circle of radius 2m with a constant speed of
6m/s. Calculate the maximum and minimum tension in the string. Take g=10N/kg
Date posted: April 11, 2018. Answers (1)
- A stone of mass 0.6kg attached to a string of length 0.5m is whirled in a horizontal circle at a constant speed. If the maximum...(Solved)
A stone of mass 0.6kg attached to a string of length 0.5m is whirled in a horizontal circle at a constant
speed. If the maximum tension in the string is 5N before it breaks, calculate:
a) The maximum speed of the stone
b) The maximum number of revolutions per second it can make
Date posted: April 11, 2018. Answers (1)
- A stone of mass 2kg is whirled in a horizontal circle of radius 0.5m. The tension in the string was found to
be 64N. Determine...(Solved)
A stone of mass 2kg is whirled in a horizontal circle of radius 0.5m. The tension in the string was found to
be 64N. Determine the velocity of the stone in the circle.
Date posted: April 11, 2018. Answers (1)
- Calculate the period and frequency of a particle in a circular path moving at an angular velocity of 4p
rads-1.(Solved)
Calculate the period and frequency of a particle in a circular path moving at an angular velocity of 4π
rads-1.
Date posted: April 11, 2018. Answers (1)
- A car of mass 100kg moves round a circular track of radius 100m with a linear speed of 20m/s. calculate:a) The angular velocityb) The centripetal...(Solved)
A car of mass 100kg moves round a circular track of radius 100m with a linear speed of 20m/s. calculate:
a) The angular velocity
b) The centripetal force
c) The centripetal acceleration
Date posted: April 11, 2018. Answers (1)
- A particle moves at an angular velocity of 10p rads-1 along a circular path of radius 20cm. calculate its linear speed.(Solved)
A particle moves at an angular velocity of 10p rads-1 along a circular path of radius 20cm. calculate its linear speed.
Date posted: April 11, 2018. Answers (1)
- State the differences between eye and lenses camera(Solved)
State the differences between eye and lenses camera
Date posted: April 11, 2018. Answers (1)
- State the similarities between eye and lens camera(Solved)
State the similarities between eye and lens camera
Date posted: April 11, 2018. Answers (1)
- List the parts of the human eye(Solved)
List the parts of the human eye
Date posted: April 11, 2018. Answers (1)
- An object is placed in front of a converging lens of focal length 12cm.determine the position of the image
and the magnification of the image....(Solved)
An object is placed in front of a converging lens of focal length 12cm.determine the position of the image
and the magnification of the image. Hence state the nature of the image formed when the object distance
is:
Date posted: April 11, 2018. Answers (1)
- A tin closed with an airtight lid contains air at a pressure of 1.0*25Pa at a temperature of 12^oC. If the temperature at which the...(Solved)
A tin closed with an airtight lid contains air at a pressure of 1.0*2
5Pa at a temperature of 12^oC. If the
temperature at which the lid opens is 88^oC, determine the pressure attained by the gas.
Date posted: April 11, 2018. Answers (1)
- To what temperature must 2000cm3 of a gas at 270C be heated at a constant pressure in order to raise its volume to 2500cm3?(Solved)
To what temperature must 2000cm3 of a gas at 27^oC be heated at a constant pressure in order to raise its
volume to 2500cm3?
Date posted: April 11, 2018. Answers (1)
- A gas occupies a volume of 125cm3 at 150C and 755mmHg pressure. Find the volume of the gas at a
temperature of 250C if the...(Solved)
A gas occupies a volume of 125cm3 at 150C and 755mmHg pressure. Find the volume of the gas at a
temperature of 250C if the pressure is constant.
Date posted: April 11, 2018. Answers (1)