Physics P1 B

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  • Created by: 10dparkin
  • Created on: 21-05-14 21:48
What is ment by a non-renewable energy source?(name four)
A source of energy which once we have used can not be replaced,coal,oil,natural gas and nuclear fules (uranium and plutonium)
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what is ment by a renewable energy source?(name 8)
A source of energy which we have an ininate supply of ie wind,waves,tides,hudroelectric,solar,geothermal,food and biofules.
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Explain how electricity is generated in a gas fired power station?
the gas when burnt will produce heat and this heat is used in the boilers to produce steam this high pressure steam is made to hit the turbine blades and making the blades to rotate. this rotational energy is coupled to electrical generator to produc
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how is wind used to generate electricity?
the wind turbine collects kinetic energy from the wind and transfers it to the generator. The blades on the turbine turn as the wind blows. As these blades move, they rotate a shaft connected to the rotor of a generator.
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why are hydroelectric power stations often located in remote valleys?
You need a difference in height to drive the water turbines, so usually a dam is built with the power house at a lower level than the artificial lake formed by the dam. A flat area would not be any use, but you don't need a mountainous one either
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what is the purpose of pumped storage?
to store energy.
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what is the source of energy for tidal barrages?
the sea
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How can geothermal heat be used,apart from genrating electricity?
energy saving non electrical purposes.
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how are biofules produced?
they are produced from plant materials.
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why is a high electrical voltage used to transmit electricity in the National Grid?
Electricity is supplied to consumers through the National Grid at a very high voltage to reduce energy losses during transmission. Transformers are used to increase or decrease the voltage of the supply
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What is the speed of a wave with frequency of 50 kHz and wavelength of 0.3cm
15
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why does light bend as it moves through air and water?
When light hits a different surface it will slow down or speed up causing it to change direction. when light travel into water the change of speed can cause it to change direction
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what size should the gap be in order to maximumize diffraction?
the same as the wavelength.
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What is the order to the EM spectrum?
radio waves,micro,infared,visible,ultraviolet,x-rays and then gamma rays.
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why cant sound travel in a space?
the atoms being so spread out though, the human ear would not be capable of detecting the sound waves.
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are high frequency sound waves high or low pitched?
high.
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what do red shift observations tell us about the universe
it tells us it is expanding
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what is the big bang theory?
the universe was a very hot, dense, tiny ball of matter. It expanded very rapidlydue to a big bang to form the universe we know today.
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what is the evidence for the big bang theory?
The red shift of almost all galaxies, getting greater as their distance increases.
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Other cards in this set

Card 2

Front

what is ment by a renewable energy source?(name 8)

Back

A source of energy which we have an ininate supply of ie wind,waves,tides,hudroelectric,solar,geothermal,food and biofules.

Card 3

Front

Explain how electricity is generated in a gas fired power station?

Back

Preview of the front of card 3

Card 4

Front

how is wind used to generate electricity?

Back

Preview of the front of card 4

Card 5

Front

why are hydroelectric power stations often located in remote valleys?

Back

Preview of the front of card 5
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