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Grade 6 - Chapter 10 (Energy)
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The units for speed?
m/s
Thermal energy is not good for storing energy as it is?
Continually lost to the surroundings
Kinetic energy is affected by the _______ and ________ of an object
mass, speed
Calculate the efficiency of a fan that creates 320 J kinetic energy, 80 J sound and 100 J of heat.
64%
Calculate the efficiency of a TV that creates 250 J light, 350 J sound and 200 J of heat.
75%
When there is a current flowing there is _______ energy.
electrical
A coal power station provides 2000 MJ of energy. 250 MJ is wasted from wires/friction and 700 MJ of electricity is produced. How much energy is wasted from the cooling towers?
1,050 MJ
What is the standard unit of energy?
Joules
Anything luminous gives off _________ energy.
light
What is energy found in moving objects?
Kinetic
A stretched bowstring is an example of what form of energy?
Elastic
A spring is an example of what form of energy?
Elastic
Lightning is an example of what type of energy
Electrical
What a car's gas tank is filled it is gaining what form of energy?
Chemical
What form of energy is found in food?
Chemical
If you were on top of a hill what form of energy would you possess more of than if you were at the bottom of the hill?
Gravitational
What is the other term for motion energy?
Mechanical energy
What energy form used uranium
Nuclear
Energy stored in the bonds of atoms and compounds
Chemical energy
What energy comes from the sun?
Electromagnetic, Radiant, or Solar
What energy comes from splitting atoms
Nuclear