
Energy and Forces
Quiz by Horia
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57 questions
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- Q1Conservation of energyEnergy cannot be created or destroyed it can be transferredEnergy can be created or destroyed it can't be transferred30s
- Q2Units for energyKilogramsNewtonsJoules30s
- Q3Energy transfersmechanically, electrically, heating, radiationchemical, kinetic, gravitational, elastic, thermal, magnetic, electrostatic and nuclear30s
- Q4Stores of energymechanically, electrically, heating, radiationchemical, kinetic, gravitational, elastic, thermal, magnetic, electrostatic and nuclear30s
- Q5Closed SystemAn object or group of objectsa system in which energy cannot be transferred to and from the environmentA wave or group of wavesa system in which energy can be transferred to and from the environment30s
- Q6SystemAn object or group of objectsa system in which energy can be transferred to and from the environmenta system in which energy cannot be transferred to and from the environmentA wave or group of waves30s
- Q7Open Systema system in which energy cannot be transferred to and from the environmentAn object or group of objectsa system in which energy can be transferred to and from the environmentA wave or group of waves30s
- Q8How is energy commonly dissipated (wasted) to the environmentby heating or radiatinglight or sound30s
- Q9Is dissipated energy useful or wastedusefulwasted30s
- Q10how to reduce dissipation in an open systemlubrication and thermal insulationclose it30s
- Q11radiationthe transfer of heat using wavesthe movement of heat through fluids (gases and liquids) the hot fluid becomes less dense and rises (expands) the cooler fluid drops forming currentsthe movement of heat through a solid, particles vibrate and collide with neighbouring particles passing on energy30s
- Q12conductionthe transfer of heat using wavesthe movement of heat through fluids (gases and liquids) the hot fluid becomes less dense and rises (expands) the cooler fluid drops forming currentsthe movement of heat through a solid, particles vibrate and collide with neighbouring particles passing on energy30s
- Q13convectionthe movement of heat through fluids (gases and liquids) the hot fluid becomes less dense and rises (expands) the cooler fluid drops forming currentsthe movement of heat through a solid, particles vibrate and collide with neighbouring particles passing on energythe transfer of heat using waves30s
- Q14Why do we want to reduce the amount of energy wasted?because we want toTo save money and reduce wasted energy30s
- Q15what factors increase the rate of thermal energy loss from a house?larger temperature difference between in and out, the walls have a larger area, the walls are made of a material which is a thermal conductor, the walls are thin, the walls don't contain insulationsmaller temperature difference between in and out, the walls have a smaller area, the walls are made of a material which is a thermal insulator, the walls are thick, the walls don't contain conduction30s