Bridge Physics
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Questions and Answers

Which of the following is a purpose of expansion joints in bridges?

  • To improve the aesthetics of the bridge
  • To prevent cracks in the concrete
  • To increase the strength of the bridge
  • To allow for temperature-induced expansion and contraction (correct)

    • What is temperature?

  • A measure of the amount of heat in a system
  • A measure of the kinetic energy in a system
  • A measure of the energy of motion in a system (correct)
  • A measure of the thermal equilibrium of a system

    • What happens when there is a temperature difference between two systems?

  • There is no heat transfer between the systems
  • The systems reach thermal equilibrium
  • The hotter system transfers heat to the colder system (correct)
  • The colder system transfers heat to the hotter system

    • What is thermal equilibrium?

    <p>The state where two systems have the same temperature</p> Signup and view all the answers

    How does the temperature of a system change?

    <p>Through heat transfer</p> Signup and view all the answers

    Which property of a solid can change based on a change in temperature?

    <p>Length</p> Signup and view all the answers

    What is the equation used to describe linear expansion?

    <p>$\Delta L = \alpha \cdot L \cdot \Delta T$</p> Signup and view all the answers

    What happens to the volume of a gas when the temperature is increased while holding the pressure constant?

    <p>The volume increases</p> Signup and view all the answers

    Which law states that as the pressure of a gas is increased while holding the temperature constant, the volume of the gas will decrease?

    <p>Boyle's Law</p> Signup and view all the answers

    What does the coefficient of volume expansion represent?

    <p>The tendency of a material to expand or contract with a change in temperature</p> Signup and view all the answers

    According to the ideal gas law, what is the equation that relates pressure, volume, temperature, and the number of moles of a gas?

    <p>$PV = nRT$</p> Signup and view all the answers

    What does the symbol 'n' represent in the ideal gas law equation?

    <p>The number of moles of a gas</p> Signup and view all the answers

    What is the universal gas constant denoted by 'R' in the ideal gas law equation?

    <p>The universal gas constant</p> Signup and view all the answers

    How does the pressure of a gas change when the temperature is increased while the volume is held constant?

    <p>The pressure increases</p> Signup and view all the answers

    How many moles of air were inside the car when driving to class in the morning, given the following information: pressure = 101,325 Pascals, volume = 5 meters cubed, temperature = 285 Kelvin?

    <p>214 moles</p> Signup and view all the answers

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