Which will remain the same for two identical books, one lying flat and the other standing on an end?
weight
pressure
both of these
neither of these
When you stand with only one of your feet on a weighing scale, the scale reading is
the same as with both feet.
half.
doubled.
none of the above.
Jane lies on a bed of sharp nails without harm because
many of the nails don't make contact with her body.
she exercises mind over matter.
her weight is distributed over hundreds of nails.
none of the above
A hospital patient confined to bed will be less likely to develop bed sores with a
water bed.
soft mattress.
firm mattress.
none of these will help.
While standing, your blood pressure is normally greatest in your
heart.
feet.
same in each
head.
Water pressure on a submerged object is greatest against its
top.
sides.
bottom.
same against all surfaces
A dam is thicker at the bottom than at the top mainly because
surface tension exists only on the surface of liquids.
water is denser at deeper levels.
it looks better.
water pressure increases with depth.
Buoyant force acts upward on a submerged object because
it acts in a direction to oppose gravity.
pressure against its bottom is greater than pressure against its top.
the weight of fluid displaced reacts with an upward force.
When holes are drilled through the wall of a water tower, water will spurt out with the greatest speed from the hole closest to
the top of the tower.
the bottom of the tower.
the middle of the tower.
all the same
The buoyant force on an object is least when the object is
submerged near the surface.
submerged near the bottom.
partly submerged.
The buoyant force acting on a 10 N boat floating in the ocean is
10 N
more than 10 N
depends on density of sea water
less than 10 N
When a boat sails from fresh water to salt water, the boat will float
at the same water level.
lower in the water.
higher in the water.
What is the weight of water displaced by a 100-ton floating ship?
more than 100 tons
100 cubic meters
depends on the ship's shape
less than 100 tons
100 tons
A scale from which a rock is suspended reads 5 N when the rock is out of water and 3 N when the rock is submerged. Buoyant force on the rock is
3 N.
5 N.
2 N.
4 N.
A scale from which a rock is suspended reads 5 N when the rock is out of water and 3 N when the rock is submerged. The density of the rock is
the same as the density of water.
greater than the density of water.
smaller than the density of water.
can not be determined since there is not enough information.
Pumice is a volcanic rock that floats, which means its density is
equal to the density of water.
less than the density of water.
more than the density of water.
need more information.
A fish normally displaces its own
weight of water.
volume of water.
Lobsters live on the bottom of the ocean, which means their density is
equal to the density of sea water.
less than the density of sea water.
greater than the density of sea water.
The density of a submerged submarine at rest (in the middle of water not all the way down to the bottom of the ocean) is about the same as the density of
iron.
a floating submarine.
water.
An egg rests at the bottom of a bowl filled with water. When salt is slowly added to the water the egg rises and floats, from which we conclude
salt water is denser than an egg.
salt water is denser than fresh water.
When you float in fresh water, the buoyant force that acts on you is equal to your weight. When you float higher in the denser water of the Dead Sea, the buoyant force that acts on you is
equal to your weight.
less than your weight.
greater than your weight.
A person floats higher in the dense water of the Dead Sea because
of a greater buoyant force.
less volume of water is displaced.
more volume of water is displaced.
When an ice cube in a glass of water melts, the water level
remains the same.
rises.
falls.
A floating ice cube contains small pieces of iron. The water level after melting will
fall.
rise.
remain unchanged.
When you observe the applications of pistons in hydraulic lifting operations you're seeing
Pascal's principle in action.
how energy can be increased.
both of these.
neither of these.
To multiply an applied force while using a simple hydraulic lift, your force should be applied to the
large-diameter piston.
relative piston sizes don't matter.
small-diameter piston.
