P.O.E. Warm-up Quiz #5

5 Questions | Total Attempts: 32

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P.O.E. Warm-up Quiz #5

Sept. 24 - Sept 28


Questions and Answers
  • 1. 
    A substance with a mass of 10 kg gains 175 kJ of heat when its temperature increases 12°C. What is this substance's specific heat?
    • A. 

      1458.3 J/Kg K

    • B. 

      21,000 J/Kg K

    • C. 

      1574 J/Kg K

    • D. 

      2757 J/Kg K

  • 2. 
    How much energy is needed to heat 2.5 kg of sand, which has a specific heat of 664 J/(kg K) from 30°C to 50°C?
    • A. 

      33.2 kJ

    • B. 

      3.15 kJ

    • C. 

      3320 J

    • D. 

      3.32 J

  • 3. 
    Calculate the voltage difference in a circuit with a resistance of 12 Ω if the current in the circuit is 1.8 A.
    • A. 

      14.4 v

    • B. 

      22.5 v

    • C. 

      21.6 v

    • D. 

      17.2 v

  • 4. 
    What is the current flowing into a microwave oven that requires 750 W of power if the voltage difference is 110 V?
    • A. 

      6.82 A

    • B. 

      82,500 A

    • C. 

      3012.5 A

    • D. 

      2.6 A

  • 5. 
    An appliance with a resistance of 225 Ω is connected to a 120-v power supply.  How much power is suppuiled to the appliance?
    • A. 

      64.0 watts

    • B. 

      27,000 watts

    • C. 

      308.1 Watts

    • D. 

      15.0 watts

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