water pressure

What is water pressure?

• The force exerted by the weight of water against a surface

• The force exerted by the weight of oil against a surface

• The force exerted by the weight of air against a surface

• The force exerted by the weight of sand against a surface

How is water pressure measured?

• Kilograms per square inch

• Pounds per square inch

• Liters per square inch

• Gallons per square inch

What is the pressure of water at a depth of 4,500 feet?

• 300,000 pounds per square foot

• 250,000 pounds per square foot

• 200,000 pounds per square foot

• 280,000 pounds per square foot

What is Pascal's principle?

• When a force squeezes a fluid, the force is transmitted throughout the entire fluid

• The wings of an airplane are curved on top and nearly flat underneath

• Fluids have no definite shape

• A fast-moving fluid has a lower pressure than a slow-moving one

What is Bernoulli's principle?

• A fast-moving fluid has a lower pressure than a slow-moving one

• Fluids have no definite shape

• When a force squeezes a fluid, the force is transmitted throughout the entire fluid

• The wings of an airplane are curved on top and nearly flat underneath

Why does water flow with more force from a thin nozzle compared to a wider faucet?

• Because the water pressure is higher in a thin nozzle

• Because the water pressure is lower in a thin nozzle

• Because the water pressure is higher in a wider faucet

• Because the water pressure is lower in a wider faucet

What is the shape of an airplane's wings called?

• Aero shape

• Aerodynamic wing

• Aerofoil

• Aerodynamic shape

Why are the wings of an airplane curved on top and nearly flat underneath?

• To increase drag

• To decrease lift

• To create lift

• To decrease pressure

What happens when air flows over the top of an airplane wing?

• The air moves slower than the air passing underneath

• The air pressure increases

• The air moves faster than the air passing underneath

• The air pressure decreases

What is the purpose of hydraulic brakes in machinery?

• To create lift

• To decrease pressure

• To increase pressure

• To transmit force