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- @What units are work measured in?
- Joules
- Newtons
- Watts
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- @The energy an object has because of its height above ground level is called:
- Potential energy
- Kinetic energy
- Displacement energy
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- @A moving object has what kind of energy?
- Kinetic
- Potential
- Inertia
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- @What does the Law Of Conservation Of Energy say?
- Only the form of energy can be changed
- Energy can be created and destroyed
- Energy can only be created
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- @What is the unit of power?
- Watt
- Joule
- Pascal
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- @1 Watt is:
- The rate of using energy at a rate of 1 Joule per second
- Moving 1 Kg a distance of 1 mĀ
- Lifting a 1Kg mass up 1 m in 1 minuteĀ
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- @Kinetic energy depends on:
- mass and velocity
- mass only
- height and gravity
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- @In most machines much of the supplied energy is wasted. Why is this?
- Friction coverts it to heat
- They are not designed very well
- They use fossil fuels
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- @Three types of potential energy are:
- Gravitational, elastic & chemical
- Chemical, friction & heat
- Elastic, kinetic & gravitational
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- @Where does nearly all the energy used on the planet originate?
- The sun
- From oil and coal
- From chemical reactions
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- @Electrical energy is often quoted in megawatts? How many watts are there in 1 megawatt?
- 1 million
- 1 thousand
- 10 thousand
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- @How many kilowatts is 2500 watts?
- 2.5
- 25.0
- 0.25
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- @The law of conservation of energy means:
- energy can't be created or destroyed
- energy must not be wasted
- the worlds supply of fossil fuels is running out and can't be replaced
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- @In which of the following statements is a force doing work?
- Railway engine pulling its carriages
- A book resting on a table
- A nail hanging from a magnet
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- @Which requires the most amount of work to be done - using a 1N force to lift an object 1m or using a 1N force to slide the object 1m along the floor?
- They both require the same
- Lifting the mass
- Pushing the mass
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