i. The size of source of light
ii. The size of opaque object
iii. The distance between the object and the source of light.
joseph rimiru answered the question on October 30, 2017 at 21:12
- What does rectilinear propagation of light mean?(Solved)
What does rectilinear propagation of light mean?
Date posted: October 30, 2017. Answers (1)
- State the formula for finding the number of images formed when mirrors are placed at an angle to each other(Solved)
State the formula for finding the number of images formed when mirrors are placed at an angle to each other.
Date posted: October 30, 2017. Answers (1)
- State the laws of reflection for all reflecting surfaces.(Solved)
State the laws of reflection for all reflecting surfaces.
Date posted: October 30, 2017. Answers (1)
- Define the following terms as used in reflection of light (a) Incident ray (b) Angle of incidence (c) Reflected ray (d) Normal ray (e) Angle of reflection(Solved)
Define the following terms as used in reflection of light.
a. Incident ray
b. Angle of incidence
c. Reflected ray
d. Normal ray
e. Angle of reflection
Date posted: October 30, 2017. Answers (1)
- Define the terms: (a)Opaque (b)Translucent (c) Opaque (d) Umbra (e) Penumbra(Solved)
Define the terms:
a. Opaque
b. Translucent
c. Opaque
d. Umbra
e. Penumbra
Date posted: October 30, 2017. Answers (1)
- Define the terms : (a) Luminous sources (b) Non luminous sources(Solved)
Define the terms :
a. Luminous sources
b. Non luminous sources
Date posted: October 30, 2017. Answers (1)
- Explain the following: (a) Two thin T-shirts are warmer than a single thick one (b) Hot flames go upwards (c) A chimney and a fire help to ventilate a room.(Solved)
Explain the following:
a. Two thin T-shirts are warmer than a single thick one
b. Hot flames go upwards
c. A chimney and a fire help to ventilate a room.
Date posted: October 30, 2017. Answers (1)
- What is thermal equilibrium?(Solved)
What is thermal equilibrium?
Date posted: October 30, 2017. Answers (1)
- (a) Define the terms heat and temperature of stating their SI units (b) How is heat measured?(Solved)
a. Define the terms heat and temperature of stating their SI units
b. How is heat measured?
Date posted: October 30, 2017. Answers (1)
- In designing a solar heater explain the following: (a) Why the pipe is fixed to a dark coloured collector plate (b) Why the pipe is made of copper(Solved)
In designing a solar heater explain the following:
a. Why the pipe is fixed to a dark coloured collector plate.
b. Why the pipe is made of copper
c. Why the pipe is coiled several times
d. Why the collector plate is fixed to an insulator
e. Why the panel front is made of glass.
Date posted: October 30, 2017. Answers (1)
- A man's feet felt cold while standing on cement compare to a wooden floor. Explain(Solved)
A man's feet felt cold while standing on cement compare to a wooden floor. Explain.
Date posted: October 30, 2017. Answers (1)
- Which features of the clinical thermometer make it special?(Solved)
Which features of the clinical thermometer make it special?
Date posted: October 30, 2017. Answers (1)
- List three main feature of the common liquid-in-glass thermometer.(Solved)
List three main feature of the common liquid-in-glass thermometer.
Date posted: October 30, 2017. Answers (1)
- State four properties of a liquid that is suitable for use in a thermometer.(Solved)
State four properties of a liquid that is suitable for use in a thermometer.
Date posted: October 30, 2017. Answers (1)
- A mechanic wants to fit an iron ring tightly onto a steel rod of equal diameter to the inner diameter of the ring. Explain how...(Solved)
A mechanic wants to fit an iron ring tightly onto a steel rod of equal diameter to the inner diameter of the ring. Explain how this can be achieved.
Date posted: October 30, 2017. Answers (1)
- State and explain two disadvantages of anomalous expansion of water.(Solved)
State and explain two disadvantages of anomalous expansion of water.
Date posted: October 27, 2017. Answers (1)
- Explain briefly a mechanism by which heat is conducted through a metal.(Solved)
Explain briefly a mechanism by which heat is conducted through a metal.
Date posted: October 27, 2017. Answers (1)
- Force F acts on a body of mass M such that its velocity changes from u to v in time t. Derive from first principles...(Solved)
Force F acts on a body of mass M such that its velocity changes from u to v in time t. Derive from first principles the equation: F=ma.
Date posted: October 27, 2017. Answers (1)
- For a body to be at equilibrium under the action of parallel forces two conditions must be satisfied.
State one condition of equilibrium.(Solved)
For a body to be at equilibrium under the action of parallel forces two conditions must be satisfied.
State one condition of equilibrium.
Date posted: October 27, 2017. Answers (1)
- Explain why water stored in an earthen jar becomes cooler than the one which is stored in a metallic jar.(Solved)
Explain why water stored in an earthen jar becomes cooler than the one which is stored in a metallic jar.
Date posted: October 27, 2017. Answers (1)