4081090
Descripción
Test por Winston Schultz, actualizado hace más de 1 año
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Creado por Winston Schultz
hace más de 8 años
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Pregunta 1
Pregunta
Which will remain the same for two identical books, one lying flat and the other standing on an end?
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weight
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pressure
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both of these
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neither of these
Pregunta 2
Pregunta
When you stand with only one of your feet on a weighing scale, the scale reading is
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the same as with both feet.
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half.
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doubled.
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none of the above.
Pregunta 3
Pregunta
Jane lies on a bed of sharp nails without harm because
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many of the nails don't make contact with her body.
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she exercises mind over matter.
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her weight is distributed over hundreds of nails.
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none of the above
Pregunta 4
Pregunta
A hospital patient confined to bed will be less likely to develop bed sores with a
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water bed.
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soft mattress.
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firm mattress.
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none of these will help.
Pregunta 5
Pregunta
While standing, your blood pressure is normally greatest in your
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heart.
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feet.
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same in each
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head.
Pregunta 6
Pregunta
Water pressure on a submerged object is greatest against its
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top.
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sides.
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bottom.
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same against all surfaces
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none of the above
Pregunta 7
Pregunta
A dam is thicker at the bottom than at the top mainly because
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surface tension exists only on the surface of liquids.
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water is denser at deeper levels.
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it looks better.
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water pressure increases with depth.
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none of the above
Pregunta 8
Pregunta
Buoyant force acts upward on a submerged object because
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it acts in a direction to oppose gravity.
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pressure against its bottom is greater than pressure against its top.
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the weight of fluid displaced reacts with an upward force.
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none of the above
Pregunta 9
Pregunta
When holes are drilled through the wall of a water tower, water will spurt out with the greatest speed from the hole closest to
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the top of the tower.
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the bottom of the tower.
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the middle of the tower.
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all the same
Pregunta 10
Pregunta
The buoyant force on an object is least when the object is
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submerged near the surface.
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submerged near the bottom.
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partly submerged.
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none of the above
Pregunta 11
Pregunta
The buoyant force acting on a 10 N boat floating in the ocean is
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10 N
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more than 10 N
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depends on density of sea water
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less than 10 N
Pregunta 12
Pregunta
When a boat sails from fresh water to salt water, the boat will float
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at the same water level.
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lower in the water.
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higher in the water.
Pregunta 13
Pregunta
What is the weight of water displaced by a 100-ton floating ship?
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more than 100 tons
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100 cubic meters
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depends on the ship's shape
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less than 100 tons
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100 tons
Pregunta 14
Pregunta
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
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3 N.
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5 N.
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2 N.
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4 N.
Pregunta 15
Pregunta
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
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the same as the density of water.
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greater than the density of water.
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smaller than the density of water.
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can not be determined since there is not enough information.
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none of the above
Pregunta 16
Pregunta
Pumice is a volcanic rock that floats, which means its density is
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equal to the density of water.
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less than the density of water.
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more than the density of water.
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need more information.
Pregunta 17
Pregunta
A fish normally displaces its own
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weight of water.
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volume of water.
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both of these
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neither of these
Pregunta 18
Pregunta
Lobsters live on the bottom of the ocean, which means their density is
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equal to the density of sea water.
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less than the density of sea water.
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greater than the density of sea water.
Pregunta 19
Pregunta
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
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iron.
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a floating submarine.
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water.
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none of the above
Pregunta 20
Pregunta
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
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salt water is denser than an egg.
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salt water is denser than fresh water.
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both of these
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neither of these
Pregunta 21
Pregunta
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
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equal to your weight.
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less than your weight.
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greater than your weight.
Pregunta 22
Pregunta
A person floats higher in the dense water of the Dead Sea because
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of a greater buoyant force.
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less volume of water is displaced.
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more volume of water is displaced.
Pregunta 23
Pregunta
When an ice cube in a glass of water melts, the water level
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remains the same.
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rises.
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falls.
Pregunta 24
Pregunta
A floating ice cube contains small pieces of iron. The water level after melting will
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fall.
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rise.
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remain unchanged.
Pregunta 25
Pregunta
When you observe the applications of pistons in hydraulic lifting operations you're seeing
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Pascal's principle in action.
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how energy can be increased.
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both of these.
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neither of these.
Pregunta 26
Pregunta
To multiply an applied force while using a simple hydraulic lift, your force should be applied to the
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large-diameter piston.
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relative piston sizes don't matter.
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small-diameter piston.
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