v/u = hi/ho
hi= (6cm*8cm)/24cm = 2cm.
Moraa orina answered the question on April 6, 2018 at 18:08
-
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. Answers (1)
- State the factors affecting thermal conduction in solids(Solved)
State the factors affecting thermal conduction in solids
Date posted: April 6, 2018. Answers (1)
- Explain the anomalous (unusual) expansion of water(Solved)
Explain the anomalous (unusual) expansion of water.
Date posted: April 6, 2018. Answers (1)
- Consider a brass rod of length 50.2 cm at 16.60C. if the rod is heated until a temperature of 99.50C where
its new length is...(Solved)
Consider a brass rod of length 50.2 cm at 16.60C. if the rod is heated until a temperature of 99.50C where
its new length is 50.279 cm, determine the linear expansivity of brass.
Date posted: April 6, 2018. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- Describe an experiment to demonstrate Brownian motion in liquids(Solved)
Describe an experiment to demonstrate Brownian motion in liquids.
Date posted: April 6, 2018. Answers (1)
- 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. Answers (1)
- Calculate the pressure exerted by a column of kerosene of 850mm. take the density of kerosene=
800kgm-3(Solved)
Calculate the pressure exerted by a column of kerosene of 850mm. take the density of kerosene=
800kgm-3
Date posted: April 6, 2018. Answers (1)
- A man whose mass is 90kg stands on a floor.
a) If the area of contact between his feet and the floor is 0.0368m2, determine...(Solved)
A man whose mass is 90kg stands on a floor.
a) If the area of contact between his feet and the floor is 0.0368m2, determine how much pressure he
able to exert on the floor.
b) What pressure will he exert on the floor if now he stands on one foot?
Date posted: April 6, 2018. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- Describe the types of force(Solved)
Describe the types of force
Date posted: April 6, 2018. Answers (1)
- State thr effects of force on a body
(Solved)
State the effects of force on a body
Date posted: April 6, 2018. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)
- 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. Answers (1)