practicals 6 markers

• Specific heat capacity

  • Record mass of metal block using mass balance
  • Wrap block in layer of insulation
  • heat metal block using an immersion heater
  • Record energy transferred using joulemeter
  • record temperature change over time using thermometer and stopwatch
  • plot temperature against time
  • calculate temperature change using graph
  • use shc equation
• I-V Graphs

  • Record current using ammeter
  • Record voltage using voltmeter
  • Adjust variable resistor to adjust current in circuit
  • Repeat these steps to get multiple readings of each
  • reverse connections and repeat
  • plot I-V graph
• Investigating resistance

  • set clips 0cm apart
  • voltmeter in parallel to measure voltage
  • ammeter in series to measure current
  • turn on switch
  • calculate resistance
  • turn off switch
  • move clips apart
  • repeat steps 4-7
  • plot graph
• Density of irregular solid

  • measure mass using balance
  • fill eureka can with water to rim
  • object will displace water from beaker
  • volume of water displace = volume of object
  • density = mass/volume
• Density of a liquid

  • Place measuring cylinder on mass balance
  • pour out 5cm cubes of liquid into cylinder
  • record mass change
  • density=mass/volume
  • repeat steps 2-4 and calculate average
• Insulation

  • wrap the same thickness of different materials around beakers
  • pour in boiling water, the same volume for each beaker
  • measure initial temperature for each beaker using a thermometer
  • start stopwatch and record temp every 2 minutes until 10 minutes has passed
  • use a lid to minimise heat loss