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14 questions
The three types of fossil fuel are natural gas, coal and ...
methane
oil
uranium
wood
What does carbon neutral mean?
It describes fuels that when burned will not increase carbon dioxide in the atmosphere.
It describes fuels that when used will not increase carbon buried in the ground.
It describes fuels that when burned will not emit carbon dioxide.
It describes fuels that when burned will not leave any carbon behind.
What is a fuel?
something that can react to release chemical energy
something that can react to release energy as heat and light
an energy resource that will run out
an energy resource that will never run out
In tidal power what is built across a river estuary?
a bridge
a dam
A soccer player kicks a ball with 20 Newtons of force causing it to travel 100 meters. How much work is done on the ball?
200 J
80 J
5 J
2000 J
What is the gravitational potential energy of an 85 kg mountain climber at the summit of a 6267 m volcano?
Let g = 9.8N/kg
5,220,411 J
532,695 J
73.7 J
54,356.6 J
Total energy = 350J
Useful energy = 70J
Workout the efficiency of this iphoneX.
efficiency = total energy inuseful energy ×100%
100%
80%
40%
20%
Energy is transferred from the kinetic store of a singer's vocal cords to the kinetic store of your eardrums by
Work done
Electric current
Heating
Radiation
What is the Equation for Work Done?
Work Done = Force x Distance
Work Done = Force / Distance
Work Done = Distance / Force
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