Physics

• What is the SI unit for milliamps?

  Amps
• What does Terra mean in terms of magnitude?

  10¹²
• What does Giga represent in terms of magnitude?

  10⁹
• What does Mega represent in terms of magnitude?

  10⁶
• What does kilo represent in terms of magnitude?

  10³
• What does centi represent in terms of magnitude?

  10^-2
• What does milli represent in terms of magnitude?

  10^-3
• What does micro represent in terms of magnitude?

  10^-6
• What does nano represent in terms of magnitude?

  10^-9
• How can you remember the order of prefixes?

  By noting the pattern of decreasing by three
• What are the energy stores that students need to know?

  • Kinetic energy
  • Gravitational potential energy
  • Elastic potential energy
  • Internal or thermal energy
  • Chemical energy
  • Nuclear energy
  • Magnetic energy
  • Electrostatic energy
• What is kinetic energy?

  Energy of a moving object
• What is gravitational potential energy?

  Energy an object has when raised above ground
• What is elastic potential energy?

  Energy stored in a stretched or compressed object
• What is internal or thermal energy?

  Total kinetic and potential energies of particles
• What is chemical energy?

  Energy stored in chemical bonds
• What is nuclear energy?

  Energy stored in the nucleus of an atom
• What is magnetic energy?

  Energy a magnetic object has near a magnetic field
• What is electrostatic energy?

  Energy a charged object has near another charged object
• What are the methods of energy transfer?

  1. Heating
  2. Radiation
  3. Electrical work
  4. Mechanical work
• How is energy transferred by heating?

  From one object to another via temperature difference
• How is energy transferred by radiation?

  As a wave, such as infrared radiation
• How is energy transferred by electrical work?

  By the flow of charge due to potential difference
• How is energy transferred by mechanical work?

  Due to a force moving an object through a distance
• What happens to a book falling from a shelf?

  Gravitational energy transfers to kinetic energy
• What is the formula for work done?

  Work done = force × distance
• What are the units for work done?

  Joules
• What are the units for force?

  Newtons
• What are the units for distance?

  Meters
• What is one joule equal to?

  One newton meter
• What happens when work is done against friction?

  It results in a temperature increase
• What is the formula for kinetic energy?

  Kinetic energy = ½ × mass × velocity²
• What are the units for kinetic energy?

  Joules
• What is the formula for gravitational potential energy?

  Gravitational potential energy = mass × gravitational field strength × height
• What are the units for gravitational potential energy?

  Joules
• What is the formula for power?

  Power = energy transferred / time
• What are the units for power?

  Watts
• What is the relationship between energy transfer and power?

  One joule per second equals one watt
• What does the law of conservation of energy state?

  Energy cannot be created or destroyed
• What happens when energy is dissipated?

  It is transferred to less useful stores