Fluid Dynamics and Atmospheric Pressure

The lecture covers atmospheric pressure, Boyle's Law, and Bernoulli's Principle. It explains the properties of gases, the concept of fluids, and the differences between fluid statics and dynamics. Atmospheric pressure is discussed in relation to weather prediction and vacuum pumps. Boyle's Law is introduced with a focus on the relationship between pressure and volume. Bernoulli's Principle is explained with examples like airplane wings and spinning baseballs, highlighting the relationship between fluid speed and pressure.

Which of the following is NOT considered a fluid?

• Plasma

• Gas

• Liquid

• Solid

What causes atmospheric pressure?

• The weight of solids

• The weight of plasma

• The weight of air

• The weight of water

How can weather conditions be predicted?

• By measuring the temperature

• By measuring the humidity

• By measuring atmospheric pressure

• By measuring wind speed

What is the function of a barometer?

• To measure temperature

• To measure humidity

• To measure atmospheric pressure

• To measure wind speed

According to Boyle's Law, what happens to the pressure of a gas if its volume decreases while temperature remains constant?

• Pressure decreases

• Pressure remains constant

• Pressure increases

• Pressure becomes zero

What does Bernoulli's principle state about the relationship between fluid speed and pressure?

• As fluid speed increases, pressure decreases

• As fluid speed increases, pressure increases

• As fluid speed decreases, pressure decreases

• Fluid speed and pressure are unrelated

What is the principle of continuity in fluid dynamics?

• Mass is not conserved in fluid flow

• Mass is conserved in fluid flow

• Volume is not conserved in fluid flow

• Volume is conserved in fluid flow

How does Bernoulli's principle explain the lift in airplane wings?

• Lower pressure below the wing creates lift

• Higher pressure above the wing creates lift

• Higher pressure below the wing creates lift

• Lower pressure above the wing creates lift

What happens to a roof during high winds according to Bernoulli's principle?

• The roof is pushed down

• The roof is pushed up

• The roof is pushed sideways

• The roof is unaffected

How does the spinning of a baseball affect its trajectory?

• It slows the ball down

• It causes the ball to curve

• It makes the ball go straight

• It has no effect