Font size
WorksheetsPhysics of Fluids Challenge : Will You Sink or Swim?
Total questions: 28
Worksheet time: 45mins
The pressure you feel under water increases as your depth increases.
True
False
An object exerts 360 N of force on a surface that has an area of 8.0m2. How much pressure does the object exert?
5.625 Pa
45 Pa
70 Pa
45 N
A simple U-tube or manometer has a side filled with water and another with an unknown blue fluid. Which fluid has the greater density?
water
unknown fluid
both have the same density
A rock of irregular shape sinks to the bottom of water when placed in it. Which two of the following, when used together, could be used to determine its density?
Measure the mass of the rock on a scale
Measure the mass of the beaker of water on a scale
Place the rock in a beaker and measure the change in height of the water
Place the rock in a beaker and measure the height of the water above it
Assume both sides of the manometer at the right are open to the outside atmosphere, and that the system has had time to reach equilibrium. Rank the fluids in order from most dense to least dense.
Fluid A, oil, water, mercury
oil, water, Fluid A, mercury
mercury, oil, water, Fluid A
mercury, Fluid A, water, oil
A hydraulic lift has a left and right column of different areas. Which side has the greater pressure?
A1
A2
Same
A hydraulic lift has a left and right column of different areas. Which side should a car be placed on to be lifted by the system with the least input force?
A1
A2
Same
A personal submarine is spherical and can reach depths of up to 1 mile below the surface of the water. Which statement is true?
The pressure is equal on all sides of the sphere
The pressure is slightly larger on the bottom of the sphere than the top
The pressure is slightly larger on the top of the sphere than the bottom
Two spheres have equal volume in the air. One is a balloon and the other is a solid wood sphere. When brought into the water, the balloon's radius is ________ the wood's radius.
less than
greater than
equal to
Two spheres have equal volume in the water. One is a balloon and the other is a solid wood sphere. The moment you release them under water, which experiences the greater buoyant force?
wood
balloon
same buoyant force
Four blocks are suspended in water as shown. Which blocks experiences the greatest buoyant force? Choose as many as you'd like.
A
B
C
D
Which block has the largest buoyant force when floating?
A
B
C
D
Snowshoes enable a person to walk on deep snow because the snowshoes
decrease the person's weight on the snow
increase the area over which the person's weight is distributed
increase the pressure on the snow
increase the buoyancy of the person
If an object floats, the volume of displaced water is equal to the volume of
the entire object
the portion of the object that is above water
the portion of the object that is submerged
exactly half of the object
A ship stays afloat as long as the buoyant force is
less than the ship's weight
equal to the ship's weight
less than the ship's speed
greater than the ship's speed
An object that is more dense than the fluid in which it is immersed will
sink
rise
neither rise nor sink
sink at first, than rise slowly
An object with density 600 kg/m^3 is placed in a fluid whose density is 800 kg/m^3. What percentage of the object's volume will remain above water as it floats?
25
50
75
80
None of the above, it actually sinks
What is the buoyancy force felt by a 152340 kg cube whose sides are 3 m each when its placed fully under water(density of water =1000 kg/m^3)?
3000 N
90,000 N
270,000 N
3 million N
The density of most oils hovers around 900 kg/m^3. What pressure would you feel when submerged under 2 meters of oil?
9 Pa
1.8 kPa
9 kPa
18 kPa
On a typical day, the fluid on the inside of a mercury barometer will rise 760 mm above the fluid level outside. On a day whose atmospheric pressure was very low, at 50 kPa, approximately how high would the mercury rise?
380 mm
500 mm
760 mm
1520 mm
Boaz does the back-float in his backyard pool. How large of a buoyancy force does he feel as he floats motionless in his pool?
The buoyancy force at that moment must be GREATER than his weight
The buoyancy force at that moment must be LESS THAN his weight
The buoyancy force at that moment must be EQUAL TO his weight
Too hard, I have to bend my mind over backwards to answer
Which of the following statements is FALSE?
Helium is less dense than air
Hot air is less dense than cold air
Hot air balloons float by means of a buoyancy force
Its safe to fly in a lawn chair in the exact manner Larry Walters did
A can of Diet Coke floats in water, but a can of Coke sinks. Why?
The aspartame in the Diet Coke is MORE dense than the sugar or syrup in the regular Coke
The aspartame in the Diet Coke is LESS dense than the sugar or syrup in the regular Coke
The Diet Coke has a better exercise regimen, making it a better swimmer
G-d made it this way so that the Coke will be less accessible to people on a diet
