physics

• what is the unit for energy? joules
• Combustion reaction - combines oxygen with another substance to produce heat, light or both.
• What are the two types of chemical reactions? Combination and decomposition.
• what are the 2 potential energy types?
• what are the two potenetial energy types? kinetic energy elastic potential energy
• what is the formula for power? P = w/t
• what is the formula for efficiency? E = (useful output)/(total input)
• what is the formula for work done? W = F x d
• if kinetic energy is transfered to an object, what happens to its speed?

  it increases
• what is specific heat capacity?

  the amount of energy required to heat 1kg of a substance by 1 degree
• what is the kinetic energy on a 2500kg car moving at 20 M/S?

  500,000 joules
• what is radiation activity measure in?


  Becquerels
• what type of radiation is the only one not a particle?

  gamma radiation
• what is the term given to the time it takes for the number of radioactive nucli to halve?

  half life
• what type of radiation would you expect to be used in a smoke detector?

  alpha
• what is it called when somthing is exposed to alpha,beta,gamma radiation?

  irradiation