Everything 1.0
What are the units for Density?
What is Kilograms per cubic meter (kg/m3)
What is the unit for Pressure?
What is Pascal(Pa)
A rock has a mass of 2kg and a volume of 50cm3. What is the density of the rock?
What is .04kg/m3
A container with an open top is filled to a height H with water. A small hole is near the bottom of the container. Water comes out of the hole and lands on the floor a distance D. What can you infer about the distance when the container is filled to the top, versus when it is filled about halfway?
What is it would land further the more water it has
A perpendicular force is applied to a certain area and produces a pressure P. If the same force is applied to a twice bigger area, the new pressure on the surface is:
What is P/2
What is the difference between the pressure on the bottom of a pool and the pressure on the water surface?
pgh
A large water tank is open to the atmosphere and filled with water to a height of 4m. A small hole is punctured in the side 1m above the base. The hole has a radius of .01m and leads to a horizontal pipe that directs the water straight out. What is the volume flow rate of the water exiting the pipe?
What is 2.41x10-3 m3/s
A student places a wooden block of mass m in a container of water. The block floats with half of its volume above the surface of the water. The student then begins to stack small objects on top of the block until the wooden block is completely submerged but none of the objects stacked on top are submerged. What is the buoyant force acting on the block now?
What is 2mg
Water flows through a pipe with varying diameters. If the speed of water is 3m/s at a certain point where the pipe has a radius of 2cm. What is the speed of water at a point where the diameter is 2cm?
What is 12m/s
What is the pressure at a depth of 20 meters in the ocean? Assume the density of seawater is 1025 kg/m3.
What is 300900 Pa
A 500g block is submerged in water. The object displaces 300cm3 of water. What is the buoyant force acting on the object? Assume density of water = 1000kg/m3.
What is 2.94N
A hydraulic lift system has two pistons. The small piston has a cross-sectional area of 2cm2, and the large piston has a cross-sectional area of 100cm2. If 10N is applied to the small piston, what is the force exerted on the large piston?
What is 500N
The weather balloon shown in the figure has a volume of 120m3 and is filled with a gas of density 0.19kg/m3. The volume of the balloon material is negligible. The mass of the balloon, not including the gas, is 50kg. The balloon is attached to the ground by a cable. The air surrounding the balloon has a density of 1.2kg/m3. The tension in the cable is most nearly?
What is 712N
A vertical cylindrical tank is open at the top and filled with water to a height of 3m. There is a small hole on the side of the tank at the depth of 1m from the bottom. A flat metal plate of 2kg is placed horizontally on a frictionless table directly in front of the hole, 1.5m from the base of the tank. When the hole is opened, a stream of water begins to hit the plate. Assume: stream continues for 2 seconds and the cross-sectional area of the hole is 2x10-4m2. What is the speed of the water as it exits the hole?
What is 6.26m/s
Air moves over the top of an airplane at 200m/s and under it at 150m/s. Assuming the air density is 1.2kg/m3, what is the pressure difference from the top to the bottom?
What is -10500 Pa