Fill in the boxe to show the corresponding energy transformation.
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
Fill in the boxe to show the corresponding energy transformation.
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
State the energy changes which take place when Water stored in the dam is used to turn turbine in dynamo.
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
State the energy changes which take place when An electric bulb glows when it is connected to a source of electric current.
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
State the energy changes which take place when A piece of magnesium wire is burnt in a jar of oxygen.
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
State the energy changes which take place when A stone dropped from the top of a cliff reaches the ground after some time.
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
State the energy changes which take place when A toy car with a wound spring moves on ground.
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
Give an example
Electrical energy changes of sound energy.
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
Give an example
Chemical energy changes to heat energy.
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
Give an example
Chemical energy changes to electrical energy.
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
Give an example
Light energy changes to electrical energy.
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
Give an example
Electrical energy changes to heat energy.
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
Find the kinetic energy of a car of mass 1000 kg traveling at 72 km/h.
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
A bullet of mass 25 g has a velocity of 600 ms-1. What is the kinetic energy of the bullet? If it penetrates 50 cm into a target, find the resistive force offered by the target.
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
A lead bullet moving at 70 ms-1 is brought to rest on hitting a target. If 80% of its energy is converted into heat energy, find the rise in temperature (Sp. Heat cap. Of lead is 140 J/kgK).
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
If 60% of the potential energy available in a waterfall is converted into heat energy, find the height of the waterfall, when the temperature difference between the top and the bottom of the fall is 0.210C (sp. Heat cap. Of water = 4200J/kgK).
[2] Work, Energy and Power
Chapter: [2] Work, Energy and Power
Concept: undefined >> undefined
How does the deviation produced by a triangular prism depend on the colours (or wavelengths) of light incident on it? Which colour deviates the most and which the least?
[6] Spectrum
Chapter: [6] Spectrum
Concept: undefined >> undefined
Draw another diagram to show how the colours of spectrum of white light can be combined to give the effect of white light.
[6] Spectrum
Chapter: [6] Spectrum
Concept: undefined >> undefined
The wavelengths for the light of red and blue colours are nearly 7.8 × 10-7 m and 4.8 × 10-7 m respectively. Which colour has the greater speed in vacuum?
[6] Spectrum
Chapter: [6] Spectrum
Concept: undefined >> undefined
Fig shows part of the arrangement for obtaining pure spectrum.
(a) Complete thediagram and show how to obtain a pure spectrum.
(b) What are the conditions necessary for obtaining a pure spectrum?
[6] Spectrum
Chapter: [6] Spectrum
Concept: undefined >> undefined
