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Physics Exam revies - Feb

Quiz by Shanu Khemlani

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16 questions
Show answers
  • Q1
    An object can float provided _________ is _____________ than the _____ of the fluid,
    mass .... less .... mass
    density ..... less ..... density
    density .... less ... mass
    mass .... greater ... density
    30s
  • Q2
    The buoyant force on an object is dependent on
    the object's density
    the weight of the fluid displaced
    the shape of the object
    the mass of the object
    30s
  • Q3
    The property that most determines whether or not an object will float in oil is the object's
    mass
    density
    volume
    weight
    30s
  • Q4
    Does the air exert a buoyant force on my pencil if I throw it across the room?
    yes
    need more information
    no
    30s
  • Q5
    The buoyant force on an object submerged in a fluid depends on (choose 2)
    multiplem:/the fluid's density: the acceleration due to gravity
    the object's density
    30s
  • Q6
    An object is placed in a fluid. The buoyant force on the object is proportional to
    the volume of the object
    the density of the object
    the density of the fluid
    30s
  • Q7
    Why does a duck float?
    The duck weighs less than water
    The duck has less density than water
    The duck can swim
    The duck has feathers
    30s
  • Q8
    A wooden boat with a density of 0.48 g/cc is floating in a vat of oil whose density is 0.80 g/cc. What percentage of the boat is floating above the surface of the oil?
    40%
    60%
    42 %
    52 %
    30s
  • Q9
    Oil has a smaller density than water. Therefore, an object that will float in oil will
    float in water, with more of the object submerged
    float in water, with the same amount of the object submerged
    not float in water
    float in water, with less of the object submerged
    30s
  • Q10
    Which has a greater buoyant force acting on it, a floating 100 g piece of wood, or a floating 50 g piece of wood?
    not enough information
    Since both pieces of wood are floating, they experience the same buoyant force
    The 50 g piece of wood
    The 100 g piece of wood.
    30s
  • Q11
    A rectangular block is floating in a large pot of pure water. The block is floating with one-half of its volume submerged. Salt is slowly poured into and then dissolved into the water. What, if anything, will happen to the block as the salt is introduced into the water?
    block sinks
    block rises
    nothing changes
    30s
  • Q12
    A ship sailing from the ocean (salt-water) into a fresh-water harbour sinks slightly deeper into the water. Does the buoyant force on the ship change?
    ship floats
    ship sinks
    no change
    30s
  • Q13
    The formula for density is...
    volume/ mass
    mass/ acceleration
    mass/ volume
    30s
  • Q14
    Archimedes' Principle states that...
    The buoyant force acting on an object equals the volume of the fluid displaced by the object.
    The buoyant force acting on an object will always be equal.
    The buoyant force acting on an object equals the weight (force of gravity) of the fluid displaced by the object.
    30s
  • Q15
    What is buoyant force?
    An upward force exerted by fluids on an object.
    An downward force exerted by fluids on an object.
    30s

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