Flashcards
PHYSICS - PAPER 1 - TOPIC 1 - ENERGY -
Cards in this deck (13)
- 1name the energy stores -thermal , kinetic , gravitational potential , elastic potential , magnetic , electrostatic , nuclear and chemical
- 2describe how energy is transferred as a ball falls to the ground -the energy stored in the ball's gravitational potential energy store is transferred as the ball falls to its kinetic energy store
- 3what is the kinetic energy store equation ? -kinetic energy (J)= 0.5 x mass(Kg) x speed(2)(m/s(2))
- 4what happens to the speed on an object if energy is transferred into into kinetic energy store ? -it's speed will increase as it is being given more energy
- 5what is the gravitational potential energy store equation ? -g.p.e (J) = mass (Kg) x gravitational field strength (N/Kg) x height (m)
- 6what kind of energy is transferred when you compress a spring ? -elastic potential energy
- 7what is the definition of the specific heat capacity of a material ? -the specific heat capacity of a material is the amount of energy required to heat 1 kg of a material by 1 degree
- 8what is the equation relating to energy transferred and specific heat capacity ? -change in thermal energy (J) = mass (Kg) x specific heat capacity (J/Kg degree) x temperature change (degree)
- 9describe an experiment to find the specific heat capacity of a material -block of a sold material with two holes , one for the thermometer and the other for the heater , after measuring the mass of the block of material , wrap in insulation in order to reduce heat loss therefore increasing the overall accuracy , then insert the heater and the thermometer , measure the initial temperature of the block , set the potential difference (V) of the power supply to 10V , turn on the power supply and start the stopwatch
- 10state the conservation of energy principle -energy is always conserved , it can be transferred usefully , stored or dissipated , but can never be created or destroyed
- 11define power and give two equations used to calculate power -power = the rate of transferring energy / doing work
power (W) = work done (J) x time (s) - 12what are the units of powerwatts = W
- 13—
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- Description
- ENERGY STORES AND SYSTEMS , SPECIFIC HEAT CAPACITY , CONSERVATION OF ENERGY AND POWER , REDUCING UNWANTED ENERGY TRANSFERS AND IMPROVING EFFICIENCY AND ENERGY RESOURCES AND TRENDS IN THEIR USE
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- India Webber
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