Question

A 4 cm high rectangular wooden oak block of cross-sectional are
15cm^{2} and density 900kg/m^{3} floats in water
(Q=1000 kg/m^{3}). If the block is displaced straight
downward and then released, it will oscillate with simple harmonic
motion. Find the period of its motion.

A) 0.15s

B) 2.0s

C) 0.38s

D) 1.4s

E) 0.91s

Answer #1

A block of wood
(density 713 kg/m3)
of length L = 50.0 cm, width W = 40.0 cm, and thickness
H
=
30.0 cm floats in water (density
1.000 × 103
kg/m3).
What is the
volume percentage of the wood that is above water?
If the wood is
set to oscillate, what is its frequency?
How much can the
wood carry without sinking?

A uniform, wooden cube with length d = 3.0 cm on each
side has a density r = 500 kg/m3 and floats
motionlessly in water (density 1000 kg/m3). (Take the
acceleration due to gravity to be 9.8 m/s2.) When
pressed down by a small amount, and released, what is the
approximate frequency of the resulting up-and-down
oscillations?

A rectangular block of ice 13 m on each side and 1.1 m thick
floats in sea water. The density of the sea water is 1025
kg/m3. The density of ice is 917 kg/m3.
1)
How high does the top of the ice block float above the water
level?
2) How many penguins of mass 20 kg each can stand on the ice
block before they get their feet wet?

Chapter 26, Problem 033
A block in the shape of a rectangular solid has a
cross-sectional area of 2.72 cm2 across its width, a
front-to-rear length of 18.0 cm, and a resistance of 1060 ?. The
block's material contains 4.59 × 1022 conduction
electrons/m3. A potential difference of 36.3 V is
maintained between its front and rear faces. (a)
What is the current in the block? (b) If the
current density is uniform, what is its magnitude? What are
(c)...

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