Fluid Mechanics

Which of the following is NOT an example of laminar flow?

• a river moving slowly in a straight line
• smoke rising upward in a smooth column through air
• water flowing evenly from a slight opened faucet
• smoke twisting as it moves upward from a fire

Which of the following properties is NOT a characteristic of an ideal fluid?

• laminar flow
• turbulent flow
• nonviscous
• incompressable

Which of the following statements is NOT correct?

• A fluid flows
• a fluid has a definite shape
• molecules of a fluid are free to move past each other
• a fluid changes it shape easily

Tags

NGSS.MS-PS3-4

How does a liquid differ from a gas?

• a liquid has both definite shape and definite volume, whereas a gas has neither
• a liquid has a definite volume, unlike a gas
• a liquid has a definite volume unlike a  gas
• a liquid has a definite shape whereas a gas has a definite volume

Tags

NGSS.MS-PS3-4

Which of the following statements about floating objects is correct?

• the objects density is greater than the density of the fluid on which it floats
• the objects density is equal to the density of the fluid on which it floats
• The displaced volume of fluid is greater than the volume of the object
• They buoyant force equals the objects weight

If an object is only partially submerged in a fluid, which of the following is true.

• The volume of the displaced fluid equals the volume of the object
• the density of the fluid equals the density of the object
• the density of the fluid is greater than the density of the object
• the density of the fluid is less than the density of the object

For an ideal fluid flowing through a horizontal pipe, Bernoulli's principle and the continuity equation state that the pressure within the pipe does which of the following? (assume measurements are taken along the pipe in the direction of fluid flow.

• Pressure increases as the pip diameter increases
• pressure decreases as the pipe diameter increases
• pressure remains constant as the pipe diameter increases
• pressure increases, the decreases as the pipe diameter increases

Which of the following is true according to Pascals principle?

• pressure in a fluid is greatest at the walls of the container holding the fluid
• pressure in a fluid is greatest at the center of the fluid
• pressure in a fluid is the same throughout the fluid
• pressure in a fluid is greatest at the top of the fluid

Which of the following is NOT an example of unites for expressing pressure?

• N/m²
• kg/m²
• atm
• Pa

Which of the following occurs to a person standing near the edge of a railroad track when a high-speed train passes?

• the person tends to be pushed away from the train
• the person tends to be pulled toward the train
• the person tends to be pushed upward into the air
• the person is unaffected by the train

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2