c=f?
3.0x108m/s= 1.0x108x?
?=3.0m
Moraa orina answered the question on April 11, 2018 at 17:25
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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:
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Date posted:
April 11, 2018
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Answers (1)
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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:
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Date posted:
April 11, 2018
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Answers (1)
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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
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Answers (1)
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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 :
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c) The tension when the string is just horizontal
Date posted:
April 11, 2018
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Answers (1)
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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
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Date posted:
April 11, 2018
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Answers (1)
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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:
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b) The maximum number of revolutions per second it can make
Date posted:
April 11, 2018
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Answers (1)
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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
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Date posted:
April 11, 2018
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Answers (1)
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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:
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Date posted:
April 11, 2018
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Answers (1)
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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
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Answers (1)
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State the differences between eye and lenses camera
(Solved)
State the differences between eye and lenses camera
Date posted:
April 11, 2018
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Answers (1)
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State the similarities between eye and lens camera
(Solved)
State the similarities between eye and lens camera
Date posted:
April 11, 2018
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Answers (1)
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List the parts of the human eye
(Solved)
List the parts of the human eye
Date posted:
April 11, 2018
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Answers (1)
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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
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Answers (1)
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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
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Answers (1)
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A gas occupies a volume of 1.6 cm3 at a pressure of 1.5 * 25 Pa. find the volume it will occupy at a pressure of...
(Solved)
A gas occupies a volume of 1.6cm3 at a pressure of 1.5 * 25Pa. find the volume it will occupy at a pressure of 9.0 * 25Pa if the temperature is kept constant.
Date posted:
April 11, 2018
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Answers (1)
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The speed of light in medium 1 is 8.0*28m/s and in medium 2 is 1.5*28m/s. Calculate the refractive index of medium 2 with respect to...
(Solved)
The speed of light in medium 1 is 8.0*28m/s and in medium 2 is 1.5*28m/s. Calculate the refractive index of medium 2 with respect to medium 1.
Date posted:
April 10, 2018
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Answers (1)
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A ray of light from air passes successively through parallel layers of water, oil, glass and then into air again. If the refractive indices...
(Solved)
A ray of light from air passes successively through parallel layers of water, oil, glass and then into air again. If the refractive indices of water, oil and glass are 4/3, 6/5 and 3/2 respectively and the angle of incidence in air is 600.
Calculate
i) The angle of refraction in water.
ii) The angle of incidence at the oil-glass interface.
Date posted:
April 10, 2018
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Answers (1)
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State the differences between evaporation and boiling
(Solved)
State the differences between evaporation and boiling
Date posted:
April 10, 2018
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Answers (1)
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Explain the factors affecting rate of evaporation
(Solved)
Explain the factors affecting rate of evaporation.
Date posted:
April 10, 2018
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Answers (1)
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An aluminium tray of mass 400g containing 300g of water is placed in a refrigerator. After 80 minutes, the tray is removed and it is...
(Solved)
An aluminium tray of mass 400g containing 300g of water is placed in a refrigerator. After 80 minutes, the
tray is removed and it is found that 60g of water remains unfrozen at 0^oC. If the initial temperature of the tray and its contents was 20^oC, determine the average amount of heat removed per minute by the refrigerator. Take s.h.c of aluminium = 900JKg-1K-1, s.h.c of water = 4200JKg-1K-1, s.l.h. of fusion of ice = 3.4*25JKg
Date posted:
April 10, 2018
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Answers (1)