Fluid Dynamics

During a hurricane, the air outside a home moves much faster than the air inside the home. Which of the following is possible to happen?

• The windows can burst inward.

• The windows can burst outward.

• The windows cannot burst because the pressure inside and outside the home are equal.

• The windows cannot burst because the force inside and outside the home are equal.

Water flows through a pipe with different sized cross-sectional areas. Which section has the slowest fluid speed?

• I

• II

• III

• IV

Water flows in a horizontal pipe that is narrow but then widens. The pressure of the water moving in the pipe is

• greater in the wide part

• greater in the narrow part

• the same in both parts

Air rushes through a tube connected to a straw. The bottom of the straw is placed in water. Which of the following results from this scenario?

• Water flows out of the straw so its water level is lower than that around it.

• Water flows into the straw so its water level is higher than that around it.

• The water level stays equal inside and outside the straw.

Tags

NGSS.MS-PS3-4

Four straws are open to water on the bottom and are exposed to flowing air going through an irregular tube on the top. Which cylinder will have the highest water level?

• A

• B

• C

• D

• all the same

Water flows through a pipe whose area is constant but whose height above the ground changes. How does speed v₂ compare to v₁?

• v₁ is greater

• v₂ is greater

• both speeds are equal

Water flows through a pipe whose area is constant but whose height above the ground changes. How does speed P₂ compare to P₁?

• P₁ is greater

• P₂ is greater

• both pressures are equal

Point A of a tube is pressurized to 8 atm so that water flows uphill to tubes B, C, and D. At which point is the water speed the greatest?

• B

• C

• D

• all the same

Rank the sections in order from greatest pressure to least.

• A, B, C, D

• D, C, B, A

• A, B = C = D

• B = C = D, A

Soda bottle has three holes in it. Which will spray its water the farthest?

• top

• middle

• bottom

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2