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Conductors and insulators:
A conductor is a material that allows free flow of charges through it e.g. copper, silver, aluminium, while insulators are those materials which do not allow flow of charges through them e.g. dry wood, plastic, rubber etc.
Moraa orina answered the question on April 7, 2018 at 18:00
- Charge of 180C flows through a conductor for 3 minutes. Calculate the current flowing through the conductor.(Solved)
Charge of 180C flows through a conductor for 3 minutes. Calculate the current flowing through the
conductor.
Date posted: April 7, 2018. Answers (1)
- If the current in a circuit is 2A, calculate:
a) The charge that crosses a point in the circuit in 0.6s.
b) The number of electrons crossing...(Solved)
If the current in a circuit is 2A, calculate:
a) The charge that crosses a point in the circuit in 0.6s.
b) The number of electrons crossing the point per second. Take e=1.6*10-19C.
Date posted: April 7, 2018. Answers (1)
- State the applications of reflection at plane surfaces(Solved)
State the applications of reflection at plane surfaces
Date posted: April 7, 2018. Answers (1)
- At what angle should two mirrors be inclined to form:a) 17 images?b) 29 images?(Solved)
At what angle should two mirrors be inclined to form:
a) 17 images?
b) 29 images?
Date posted: April 7, 2018. Answers (1)
- State the laws of reflection(Solved)
State the laws of reflection
Date posted: April 7, 2018. Answers (1)
- 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. Answers (1)
-
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)