Question

A raft made of wood of a density of 0.45 g/cm^{3} has
dimensions of 450 cm by 300 cm by 35 cm . What is the maximum mass
of travelers and baggage this raft can hold on freshwater?

Answer #1

Buoyant force is equal to the weight of the water displaced by the raft.

A small sphere of wood with a density ρ = 0.40 g/cm3 is held at
rest well under the surface of a pool of water. The magnitude of
the initial acceleration of the sphere when it is released is?
The answer is 15m/s^2 but I don't know why
A block of wood of relative density 0.750 and dimensions 20.3 cm
× 30.5 cm × 40.6 cm is tossed into a choppy freshwater lake. After
a reasonable time, the approximate vertical...

A raft is made of 11 logs lashed together. Each is 42 cm in
diameter and has a length of 6.0 m . Part A How many people can the
raft hold before they start getting their feet wet, assuming the
average person has a mass of 70 kg ? Do not neglect the weight of
the logs. Assume the specific gravity of wood is 0.60. Express your
answer using two significant figures.

A raft is made of 13 logs lashed together. Each is 45 cm in
diameter and has a length of 6.5 m .
1) How many people can the raft hold before they start getting
their feet wet, assuming the average person has a mass of 65 kg ?
Do not neglect the weight of the logs. Assume the specific gravity
of wood is 0.60.
Please Recheck work when finished! and be clear please/

A wooden raft has a density of 300 kg/m3. It has an
area of 12 m2 and is 1 m thick. Assuming that the
average mass of a person is 75 kg, how many people can this raft
hold if the raft floats in salty water with density of 1029
kg/m3?

Gold has a density of 19.3 g/cm3, and quartz has a
density of 2.65 g/cm3. A sample of quartz contains gold.
If the quartz sample has a mass of 10 g and a volume of 3
cm3, what is the mass in grams of gold in the quartz
sample?

A ball has a diameter of 3.90 cm and average density of 0.0838
g/cm3. What force is required to hold it completely submerged under
water? magnitude N direction

The density of osmium is reported to be 22,610 kg/m3. What is
the density in g/cm3? What is the mass of a block of osmium
measuring 10.0 cm x 8.0 cm x 9.0 cm? Please give the electronic
configuration and orbital diagram of osmium. Is this metal
paramagnetic or diamagnetic?

The density of a certain type of plastic is 0.83
g/cm3. If a sheet of this plastic is
10.0 m long, 1.0 m wide, and 1 cm thick, what is its
mass?

Copper crystallizes with a face-centered cubic lattice and has a
density of 8.93 g/cm3.
a.) Calculate the mass of one unit cell of copper (in grams) b.)
Calculate the volume of the copper unit cell (in cm3). c.)
Calculate the edge length of the unit cell (in cm). d.) Calculate
the radius of a copper atom (in pm).

A 500g piece of wood (specific gravity =.5) floats in water
(density=1.0 g/cm^3).
A. What fraction of its volume will be submerged?
B. A 500g iron weight (density = 7.9g/cm^3) is hung from the
bottom of the floating piece of wood. What fraction of the wood is
submerged now?

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