Chapter 19: Liquids

400n

a 40,000 n car is lifted on a hydraulic piston of area 1000 square centimeters. how much force on a 10 square centimeter piston is needed to lift the car?

greater on the lead

a block of balsa wood floats on water while a block of lead the same size lies submerged in the water. the buoyant force is

remain unchanged

a boat loaded with a barrel of water floats in a swimming pool. when the water in the barrel is poured overboard the swimming pool level will

fall

a floating icecube contains a small piece of iron. after the ice cube melts the water level will

smaller-diameter piston

a hydraulic arrangement consists of water filled u-tube that is wider on one end than on the other. pistions are fitted in both ends. to multiply an imput force, the input should be the one having the

the distance through which the force acts

a hydraulic press multiplies by a force of 100. this multiplication is done at the expense of

all of the above

a hydraulic press works because

the same on both

a kilogram of lead and a kilogram of aluminum are submerged in water. the buoyant force is

the density of salt water exceeds the density of the egg

an egg is placed at the bottom of a bowl filled w water. salt is slowly added to the water until the egg rises and floats. from this experiment, one can conclude that

remain unchanged

an ice cube in a glass of water contains many air bubbles. when the ice melts the water level will

50 n per square meter

an industrial container holds 100 n of water. the area of the inside bottom of the container is 2 square meters. what pressure does the water exert on the bottom of the container?

weight of the fluid displaced

archimedes's principle says that an object is buoyed up by a force that is equal to the

lower in the water

compared to an empty ship, the same ship loaded with plastic foam will float

44 liters

floating freda, who can just barley float in fresh water has a mass of 44kg . her volume is therfore about

always sink to the bottom

if a weighted air filled balloon sinks in a lake it will

neither sink or float

if an object has a density equal to the density of water it will

sink

if an object has a density greater than the density of water it will

iceberg would rise

if the part of an iceberg that extends above the water were removed the

100 times

in a hydraulic device the output piston has 100 times the cross section area as the imput piston. this means the device will multiply force

energy output to exceed the energy input

in a hydraulic press operation it is important for the

greater than the density of seawater

lobsters live on the bottom of the ocean. the density of a lobster is

30n

one liter of water weighs about 10n. suppose a 3liter container is filled with 266 n of mercury and then lowered into a container of water. assuming the container is completely submerged, what is the buoyant force acting on it ?

are transmitted to all points of the fluid

pascal's principle says that changes in pressure at any point in an enclosed fluid

Both A and B

pressure in a liquid depends on the

3n

suppose a stone weighs 8 n in the air but in the water it only weighs 5 n. what is the buoyant force acting on the stone?

partly submerged

the buoyant force on an object is least when the object is

water

the density of a submerged submarine is about the same as the density of

surface area of the water

the pressure at the bottom of a jug filled with water does not depend on the

always true

the principle reason a hydraulic press works is that it is an exception to energy conservation

you and the jacket together have density less than your density alone

the reason a life jacket helps you float is that

the iron displaces more water than it would if it were in a solid block

the reason an iron ship doesnt sink is that

true

the reason objects immersed in a fluid experience an upward buoyant force is bc fluid pressure on the bottom of the object is greater than fluid pressure on the top of the object

is the volume of 20,000n of water

the volume of water displaced by a floating 20000n boat

the force on his finger would have been less than 1n

there is a legend of a dutch boy who bravely held back the atlantic ocean by plugging a leak near the top of a dike with his finger until help arrived. which of the following is most likely?

bottom of the object

water pressure on a submerged object is greater against the

higher in the salt water

when a boat sails from fresh water to salt water the boat will float

remains the same

when an icecube of water melts the water level

it displaces a weight of water equal to its own weight

when first put in water a plastic toy boat will sink until

the same

when you float in salt water compared to floating in fresh water the buoyant force that supports you is

neither place

where is the buoyant force on a submerged rock greater, near the surface of the fluid or 10m below the surface?

the same in both places

where is the pressure greater, one meter beneath the surface of lake michigan or one meter beneath the surface of a swimming pool?

equal to the weight of the other bucket

2 equal sized buckets are filled to the top with water. one of the buckets has a piece of wood floating in it making its total weight