Answers
1) The concept of pressure involves both - Answer-B) force and area.
/.2) Which will remain the same for two identical books, one lying flat and the other
standing on an end? - Answer-A) weight
/.3) When you stand with only one of your feet on a weighing scale, the scale reading is
- Answer-B) the same as with both feet.
/.4) Sara lies on a bed of sharp nails without harm because - Answer-B) her weight is
distributed over hundreds of nails.
/.5) A hospital patient confined to bed will be less likely to develop bed sores with a -
Answer-C) water bed.
/.6) One liter of water has a mass of - Answer-A) 1 kilogram.
/.7) While standing, your blood pressure is normally greatest in your - Answer-C) feet.
/.8) Water pressure on a submerged object is greatest against its - Answer-B) bottom.
/.9) A dam is thicker at the bottom than at the top mainly because - Answer-B) water
pressure increases with depth.
/.10) The pressure in a liquid depends on liquid - Answer-C) both of these
/.11) The pressure at the bottom of a jug filled with water does NOT depend on -
Answer-D) surface area of the water.
/.12) The mass of a cubic meter of water is - Answer-D) 1000 kg.
/.13) Buoyant force acts upward on a submerged object because - Answer-C) pressure
against its bottom is greater than pressure against its top.
/.14) When holes are drilled through the wall of a water tower, water will spurt out with
the greatest speed from the hole closest to - Answer-A) the bottom of the tower.
/.15) 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 is the more
likely scenario? - Answer-C) the force on his finger would have been less than 1 N
, /.16) A completely submerged object always displaces its own - Answer-A) volume of
fluid.
/.17) The buoyant force on an object is least when the object is - Answer-A) partly
submerged.
/.18) The least buoyant force on a rock is when it is submerged - Answer-D) none of the
above
/.19) The buoyant force acting on a 10-ton ship floating in the ocean is - Answer-B) 10
tons.
/.20) The volume of water displaced by a floating 20-ton boat - Answer-B) is the volume
of 20 tons of water.
/.21) When a boat sails from fresh water to salt water, the boat will float - Answer-B)
higher in the water.
/.22) A block of Styrofoam floats on water while a lead block of the same size block lies
submerged in the water. The buoyant force is greatest on the - Answer-A) lead.
/.23) When an object is partly or wholly immersed in a liquid, it is buoyed up - Answer-B)
by a force equal to the weight of liquid displaced.
/.24) What is the weight of water displaced by a 100-ton floating ship? - Answer-B) 100
tons
/.25) 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 - Answer-A) 2 N.
/.26) Buoyant force is greater on a submerged - Answer-B) 1-kg block of aluminum.
/.27) Buoyant force is greater on a submerged 1-cubic centimeter block of - Answer-C)
same on each
/.28) Buoyant force is greater on a submerged 10-newton block of - Answer-B)
aluminum.
/.29) 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 - Answer-C) 2.5 times
the density of water.
/.30) Pumice is a volcanic rock that floats, which means its density is - Answer-A) less
than the density of water.
/.31) A fish normally displaces its own - Answer-C) both of these