Question

A block of wood of mass 10.8 kg and density 4.42 x 10^2 kg/m3, floats on water. (a) What is the minimum amount of aluminum (density 2.70 x 10^3 kg/m3) that can be placed on top of the wood block and cause the block of wood and the aluminum to sink? (b) If instead it was a block of ice of mass 10.8 kg and density 8.90 x 10^2 kg/m3. What is the minimum amount of aluminum that can be placed on top of the ice block and cause the block of ice and the aluminum to sink?

Answer #1

A wood cube 0.26 m on each side has a density of 730 kg/m3 and
floats levelly in water.
What is the distance from the top of the wood to the water
surface? 7.0 x 10^-2m
What mass has to be placed on top of the wood so that its top is
just at the water level?

A 10cm×10cm×10cm wood block with a density of 730 kg/m3 floats
in water.
What is the distance from the top of the block to the water if
the water is fresh?
If it's seawater? Suppose that ρ=1030kg/m3.

A 10cm×10cm×10cm wood block with a density of 730 kg/m3 floats
in water.
a: What is the distance from the top of the block to the water
if the water is fresh?
b: If it's seawater? Suppose that ρ=1030kg/m3.

A 10cm×10cm×10cm wood block with a density of 750 kg/m3 floats
in water. What is the distance from the top of the block to the
water if the water is fresh?
If it's seawater? Suppose that ρ=1030kg/m3.
Express your answer to two significant figures and include the
appropriate units.

A block of wood has a mass of 3.57 kg and a density of 588
kg/m3. It is to be loaded with lead so that it will
float in water with 0.82 of its volume immersed. The density of
lead is 1.13 ? 104 kg/m3.
(a) What mass of lead is needed if the lead is on top of the
wood?
(b) What mass of lead is needed if the lead is attached below the
wood?

A block of wood has a mass of 3.67 kg and a density of 594 kg/m3
. Attached below the wood is a mass of lead. If the wood is to
float in water with 0.883 of its volume submerged, what mass of
lead will be needed? (Density of lead is 11.3x103 kg/m3 )

A wood cube 0.28m on each side has a density of 680kg/m3 and
floats levelly in water.
What is the distance from the top of the wood to the water
surface? (in m)
Express your answer using two significant figures
What mass has to be placed on top of the wood so that its top is
just at the water level? (kg)
Express your answer using two significant figures.

A block of wood has a density of 700 kg/m3 . It is placed in a
fluid in which it floats with two-thirds of its volume submerged.
What is the density of the fluid? Express your answer in kilograms
per meter cubed.

A cube of wood with dimension 20 cm and density 650
kg/m3 floats in water.
a.)What is the distance from the top surface of the cube to the
surface of the water?
b.)How much mass of lead is required to be put on cube so that
the top of the cube is level with the surface of the water?

A block of wood floats partially submerged in water. Oil is
poured on top of the water until the block of wood is totally
submerged, partially in water and partially in oil as shown in the
figure. A clear cup is partially filled with water, and has oil
floating on top of the water, almost filling the vessel. Completely
submerged in the fluids is a block. The block floats so that part
of it is in the water and part...

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