i. The angle of incidence and the angle of reflection are equal.
ii. The incident ray, reflected ray and the normal at the point of incidence all lie on the same plane.
Moraa orina answered the question on April 7, 2018 at 17:35
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A lamp of height 6cm stands in front of a pinhole camera at a distance of 24cm. the camera screen is 8cm from the...
(Solved)
A lamp of height 6cm stands in front of a pinhole camera at a distance of 24cm. The camera screen is 8cm
from the pinhole. What is the height of the image of the lamp on the screen?
Date posted:
April 6, 2018
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Answers (1)
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The distance between the pinhole and the screen in a pinhole camera is 20cm. a student uses the camera
to form an image of a...
(Solved)
The distance between the pinhole and the screen in a pinhole camera is 20cm. a student uses the camera
to form an image of a person 4m away. The person’s height is 140cm. what is the height of the image?
Determine the magnification.
Date posted:
April 6, 2018
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Answers (1)
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State the factors affecting thermal conduction in solids
(Solved)
State the factors affecting thermal conduction in solids
Date posted:
April 6, 2018
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Answers (1)
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Explain the anomalous (unusual) expansion of water
(Solved)
Explain the anomalous (unusual) expansion of water.
Date posted:
April 6, 2018
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Answers (1)
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Outline qualities of the liquid to be used in liquid in glass thermometer for the thermometer to be effective
(Solved)
Outline qualities of the liquid to be used in liquid in glass thermometer for the thermometer to be effective.
Date posted:
April 6, 2018
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Answers (1)
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Describe an experiment to demonstrate Brownian motion in air (the smoke cell experiment)
(Solved)
Describe an experiment to demonstrate Brownian motion in air (the smoke cell experiment)
Date posted:
April 6, 2018
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Answers (1)
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Describe an experiment to demonstrate Brownian motion in liquids
(Solved)
Describe an experiment to demonstrate Brownian motion in liquids.
Date posted:
April 6, 2018
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Answers (1)
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Describe an experiment to demonstrate that matter is made up of smaller particles
(Solved)
Describe an experiment to demonstrate that matter is made up of smaller particles
Date posted:
April 6, 2018
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Answers (1)
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A man weighs 900N on earth and 150N on the moon. If the earth’s gravitational field strength is 10N/kg,
determine the moon’s gravitational field strength.
(Solved)
A man weighs 900N on earth and 150N on the moon. If the earth’s gravitational field strength is 10N/kg,
determine the moon’s gravitational field strength.
Date posted:
April 6, 2018
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Answers (1)
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A body weighs 75N on the earth’s surface. Calculate its mass in grams if g= 10 N/kg.
(Solved)
A body weighs 75N on the earth’s surface. Calculate its mass in grams if g= 10 N/kg.
Date posted:
April 6, 2018
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Answers (1)
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Describe the types of force
(Solved)
Describe the types of force
Date posted:
April 6, 2018
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Answers (1)
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1800cm3 of fresh water of density 1000kgm-3 is mixed with 2200cm3 of sea water of density 1025kgm-3.
Calculate the density of the mixture in gcm-3.
(Solved)
1800cm3 of fresh water of density 1000kgm-3 is mixed with 2200cm3 of sea water of density 1025kgm-3.
Calculate the density of the mixture in gcm-3.
Date posted:
April 6, 2018
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Answers (1)
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The mass a 50cm3 density bottle is 10.0g when empty and 60.0g when filled with copper turnings upto a certain level. Some water is...
(Solved)
The mass a 50cm3 density bottle is 10.0g when empty and 60.0g when filled with copper turnings upto a
certain level. Some water is added into the bottle until it is full. The mass of the bottle and its contents is found to be 90.0g. Determine the density of the copper turnings.
Date posted:
April 6, 2018
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Answers (1)
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An object of mass 50.1g has a density of 16.7gcm-3. What is the volume of the object?
(Solved)
An object of mass 50.1g has a density of 16.7gcm-3. What is the volume of the object?
Date posted:
April 6, 2018
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Answers (1)
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The number of molecules in 18 cm cubic of a liquid is 6 multiplied by 10 powered 23. assuming the diameter of the molecule is equivalent to...
(Solved)
The number of molecules in 18 cm cubic of a liquid is 6 multiplied by 10 powered 23. Assuming the diameter of the molecule is equivalent to the side of a cube having the same length as the molecule. Determine the diameter of the molecule.
Date posted:
April 6, 2018
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Answers (1)
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Describe how to find the volume of irregularly shaped object using a eureka can
(Solved)
Describe how to find the volume of irregularly shaped object using a eureka can
Date posted:
April 5, 2018
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Answers (1)
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Describe how to measure the volume of irregularly shaped object using a measuring cylinder
(Solved)
Describe how to measure the volume of irregularly shaped object using a measuring cylinder
Date posted:
April 5, 2018
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Answers (1)
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State the disadntages of alkaline accumulators over lead-acid accumulators
(Solved)
State the disadntages of alkaline accumulators over lead-acid accumulators
Date posted:
April 5, 2018
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Answers (1)
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A battery is rated at 30 Ah. For how long will it work if it steadily supplies a current of 3 A?
(Solved)
A battery is rated at 30 Ah. For how long will it work if it steadily supplies a current of 3 A?
Date posted:
April 5, 2018
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Answers (1)
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The length of a pinhole camera is 25.0 cm. An object 2.0 cm is placed 10.0 m from the
pinhole. Calculate the height of the...
(Solved)
The length of a pinhole camera is 25.0 cm. An object 2.0 cm is placed 10.0 m from the
pinhole. Calculate the height of the image produced and its magnification
Date posted:
April 5, 2018
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Answers (1)