Can You Answer These Questions On 8th Grade Physics?

10 Questions | Total Attempts: 165

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Can You Answer These Questions On 8th Grade Physics?

When thermal energy (heat) is transferred to an object, its temperature will increase. How much it increases depends on how much thermal energy is transferred, the mass of the object and its specific heat capacity. Specific heat capacity is the amount of energy required to change the temperature of one kilogram of a substance by one degree Celsius.


Questions and Answers
  • 1. 
    What are the units of specific heat capacity?
    • A. 

      J/kgoC

    • B. 

      JkgoC

    • C. 

      J-1kg/oC

    • D. 

      W/kg/oC

  • 2. 
    As well as the specific heat capacity, what else affects the amount of thermal energy a material can store?
    • A. 

      Nothing - it's just the specific heat capacity that matters

    • B. 

      The temperature change

    • C. 

      The mass

    • D. 

      Both temperature change and mass

  • 3. 
    What symbol is used to represent the specific heat capacity of a material?
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      Shc

  • 4. 
    A block of copper was heated from 18oC to 33oC using 35 thousand joules of energy. The specific heat capacity of copper is 385 J/kgoC. What was the mass of the block of copper?
    • A. 

      2.6 kg

    • B. 

      0.385 kg

    • C. 

      385 kg

    • D. 

      It can't be worked out without more information

  • 5. 
    In a laboratory experiment, a group of students used a copper block with a hole drilled in for a thermometer and a second hole in for the heater. Which of the following is not required to calculate the specific heat capacity?
    • A. 

      Joulemeter reading at the start and end

    • B. 

      Time taken

    • C. 

      Starting temperature

    • D. 

      Mass in kg of the copper block

  • 6. 
    How much energy must be transferred to raise the temperature of 2 kg of water from 27oC to 40oC? Water has a heat capacity of 4,200 J/kgoC
    • A. 

      109,200 kJ

    • B. 

      10,920 kJ

    • C. 

      1,092 kJ

    • D. 

      109.2 kJ

  • 7. 
    When a particular car engine is working normally, 1.5 kg of coolant at a temperature of 114oC with a specific heat capacity of the of 3,800 J/kgoC passes through the radiator each second. If 91.2 kJ of energy is transferred to the surroundings, what is the temperature of the coolant leaving the radiator?
    • A. 

      16oC

    • B. 

      98oC

    • C. 

      0.016oC

    • D. 

      120oC

  • 8. 
    A homeowner uses a wood burning stove to heat his house. The casing of the stove gets hot when the wood inside is burning and is made from 120 kg of cast iron. It took 3,276 kJ of energy to raise the temperature of the stove casing from 18oC to 70oC. What is the specific heat capacity of the cast iron in J/kgoC?
    • A. 

      0.525

    • B. 

      525

    • C. 

      1.904

    • D. 

      1,904

  • 9. 
    Substances with a low specific heat capacity can store how much thermal energy?
    • A. 

      They can not store any thermal energy

    • B. 

      They can store some thermal energy

    • C. 

      They can store a lot of themal energy

    • D. 

      They can store an unlimited amount of thermal energy

  • 10. 
    The specific heat capacity of water is 4,200 J/kgoC. The specific heat capacity of mineral oil is 2,100 J/kgoC. Based on this information, which statement is correct?
    • A. 

      Mineral oil would be of little use for storing heat

    • B. 

      Water would be no use for storing heat

    • C. 

      Kilogram for kilogram, mineral oil can absorb more thermal energy than water

    • D. 

      Water can store more heat than the same mass of mineral oil

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