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Intro to Pressure quiz

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  • What is true about negative pressure systems?
    Negative pressure systems occur when the pressure inside a system is lower than the atmospheric pressure outside. This can create a vacuum effect, causing air or fluid to be drawn into the system.
  • What are true facts regarding atmospheric pressure?
    Atmospheric pressure at sea level is approximately 1.01 x 10^5 Pascals. It decreases with altitude due to the decreasing weight of the air above. Atmospheric pressure is also equivalent to 1 ATM or 760 mmHg.
  • What is the definition of pressure in physics?
    Pressure is defined as force divided by area, measured in Pascals (Pa), which is equivalent to Newtons per square meter.
  • How does atmospheric pressure change with altitude?
    Atmospheric pressure decreases with altitude due to the decreasing weight of the air above.
  • What is the formula to calculate pressure at a certain depth in a liquid?
    The formula is P_bottom = P_top + (rho)(g)(h), where rho is the density of the liquid, g is the acceleration due to gravity, and h is the depth from the surface.
  • What is gauge pressure?
    Gauge pressure is the difference between absolute pressure and atmospheric pressure, representing the additional pressure in a system relative to atmospheric pressure.
  • How is the pressure at the bottom of a liquid column calculated?
    The pressure at the bottom is calculated using the equation P_bottom = P_top + (rho)(g)(h), where P_top is the pressure at the top of the column.
  • What is the standard atmospheric pressure at sea level in Pascals?
    The standard atmospheric pressure at sea level is approximately 1.01 x 10^5 Pascals.
  • How does the pressure in a liquid change with depth?
    Pressure in a liquid increases with depth because of the increasing weight of the liquid above the point of measurement.