1) Which of these is not an energy store? a) Kinetic b) Electrical c) Gravitational Potential d) Thermal e) Chemical 2) Which of these is not an energy store? a) Radiation b) Electrostatic c) Magnetic d) Elastic Potential e) Nuclear 3) Which is not a way energy can be transferred? a) Mechanically b) Electrically c) Chemically d) by heating e) by radiation 4) What are the units for energy? a) Joules b) Newtons c) Watts d) Power e) Amps f) Volts 5) What is the formula for kinetic energy? a) E = 1/2mv b) E = mass x velocity c) E = 1/2mv2 d) E = 1/2mass2 e) m/s2 f) joules 6) What is the formula for gravitational potential energy? a) E = mpq b) E = mass x height c) E = mvp d) E = mgh e) E = P/t 7) What is the formula for elastic potential energy? a) E = 1/2k b) E = 1/2epq c) E = epq2 d) E = 1/2 ke2 e) Spring constant f) Joules 8) The amount of energy needed to change the temperature of 1kg of a material by 1 degree is its... a) mass b) energy c) specific heat capacity d) latent heat e) enthalpy 9) A 1kg block is heated using a 10V supply. The temperature increases by 6 degrees in 60 seconds. The current through the heater is 10A. What is the specific heat capacity? a) 1 b) 10 c) 100 d) 1000 e) 10000 f) 9 10) Give the equation that links power, time and energy. a) P = Et b) P = E/t c) P = t/E d) P = tE e) P = W/t 11) Give the equation that links power, work and time a) P = Et b) P = Wt c) P= tW d) P = W/t e) P = t/W 12) Which of these would not reduce unwanted energy transfers? a) Insulation in the walls of homes b) Oiling moving parts c) Thinner walls in buildings d) walls with low thermal conductivity 13) 36000J of energy is transferred to a tv. 28800J is transferred usefully. What is the efficiency? a) 1.25 b) 80 c) 0.8 d) 0.7 e) 0.25 14) Which is the odd one out? a) Solar b) Wind c) Water waves d) Hydro electricity e) Coal f) Biofuels 15) What are the disadvantages of using wind power? a) They are in open spaces b) They are not reliable c) They cause carbon emissions d) They produce no pollution

Physics 1 Energy Revision

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