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Television needs ...................... energy to be operated and changes into .................... and ..................... energies which are forms of kinetic energy
electrical - light - sound
(what happens if ) you let the ball of Newton's cradle move towards the rest of balls (according to the change of energy)
the potential energy changes into kinetic energy
If two objects collide with each other, the energy after collision is ................. the energy before collision
equal to
Find the speed of a runner, if you know that he covers 400 meters in 80 seconds
speed = distance/time = 400/80 = 5 m/sec
(give reason) When a stone is thrown upwards, its potential energy increases
because its height from the surface of Earth increases
(write the scientific term) It is a form of kinetic energy due to vibrations of particles in a substance as it heats up
thermal energy
The train's position changes relative to the train station. This sentence describes the meaning of ........................
motion
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